First off not every suggestion is meant to be used together. Several changes will harp on problems with an ability/race and using any one of those would be a decent change to help mitigate the issue. On to the changes.
Server
Unrestrict Awp/Autos or restrict P90 as well.
All races
200-250 HP hard cap
Shopmenu
Mask: Broken, fix or remove.
Boots: Increase bonus speed by 0.1-0.15
Add: Longjump item Cost 3500-4500
Add: Dust of apperance; colors enemy model some color for 3-6 seconds when hit. Should be made to work against bond, lion, rapscallion and any partial invis race
Undead
Vampiric Aura: Remove tracing visual
Vampiric Aura: Decrease leech amount by 15% at max, increase leech chance by 5% at max
Human
Stormwind Cloak: Decrease invis percentage by 10-15% at max level
Bash: Remove visual
Bash: [This one will actually pertain to and be referenced by other skills later on that use the same method of stopping player movement] Remove 100% slow(This is an extremely poor way to handle assuring players are frozen due to how slows affect aim and recoil). Replace with a try/catch similar to lace that will detect if player is using a jetpack like ability or if the player is currently bashed or affected by another movement stopping skill. It will stop the ability for the duration of the bash, freeze them, then unfreeze and enable the skill again.
Shopmenu: Restrict Orb of Frost and Periapt of health.
Orcish Horde
Critical Strike: Remove tracing visual
Critical Strike: Decrease critical strength by 15-25%, increase chance by 5-8% at max levels
Respawn: Decrease god mode time by half
Night Elf
Evasion: Remove tracing visual
Trueshot Aura: Remove tracing visual
Thorns: Remove tracing visual
Entangling Roots: See bash
Entangling Roots: Decrease entangled time by 2-3 seconds at max level; decrease cooldown by 25%
Shopmenu: Restrict Helm of Excellence
Blood Mage
Banish: Rework this totally. Current banish is a concept failure as it alters the location of the crosshair making it 100% luck based kills while under its effects. The old reverse zoom was hugely effective.
Flame Strike: Reduce burn time by half; Decrease cooldown by 30%
Shadow Hunter
Hex: Extremely underpowered. Only current value is attacking molecule through it's ultimate at a very rare chance. Perhaps a 1-5% chance ability to cause enemies to reload their weapon on attack.
Warden
Shadow strike: Double the slow and damage
Vengeance: Add a 5-25% chance to go into a Vengeance frenzy upon respawn gaining 10-30 HP and an addtional 4-12 damage on attack.
Crypt Lord
Locust Swarm: Do not allow use if player cannot gain any HP from use
Locust Swarm: Add a range 1.5 times the size of Orcish Horde chain lighting
Locust Swarm: Change to passive with a 1-5% chance to inflict 10-30 damage and 15-35 armor damage on attack
Archmage
Earthquake: Decrease shake by a magnitude of 2
Weapons of the Archmage: Add a menu asking if you want to receive the weapons when it procs
Flame Predator
Claw Attack: Change from a weapon drop to forcing the player to pull out their knife
Burning Blade: Decrease burn time by 0.5-1 seconds
Molecule
Speed: Decrease by 0.5-0.1 at max level
Evade: Decrease by 5% at max level
Force Field: Make it a clone of Shadow Hunters Voodoo
Force Field: Change to doubling evade for 2-6 seconds remove freeze and 100% slow
Genocide
Regeneration: Change to a gain of 10-24(2 per level) HP per kill and 5% speed per kills.
Spider Man
Spidey Sense: drop max chance to 25% evade
Agility: Max LJ 140-150% drop speed by 10% at max
Web Shooter: See Bash.
Web Shooter: 25% chance at max
Weblines: Add a 2-3 second cooldown. Have a longer cooldown at earlier levels.
Succubus Hunter
DTransformation: Add 10-25% speed when used
Panorama
Wall Climb: Check to make sure values are the same as what the skill info says.
Flip view: Cut time flipped by half
Rematch: Set a limit to rematches; 2 maybe 3
Vagabond
Half the total levels of the race change new skill maxes to be 75-80% of current maxes
Flickering Shadows: Remove and deduct the levels from the total level of the race
Levitation: Change values to .8-.4 of normal.
Complete Invisibility:[Will also apply to Vagalion] Add a 3 second cooldown to all levels
Complete Invisibility:[Will also apply to Vagalion] Add a delay to when the player becomes invisible making it in flight rather than before
Complete Invisibility:[Will also apply to Vagalion] Add a trail for 0.25 seconds after initial use
Complete Invisibility:[Will also apply to Vagalion] Half the time after use that the player is frozen
Shopmenu: Restrict Periapt of Heath
Strider Hiryu
(Remove the race; I'm serious with this )
Flying Dragon: Decrease speed to a maximum of 1.7; 1.6 preferred
Flying Dragon: Add a 25-10 second cooldown after releasing the ability1 key
Kayakujutsu: Decrease burn time by half
Kayakujutsu: Remove burn time, replace with a 10% slow for the current burn time
Portal: Add a 30-15 second cooldown
Shopmenu: Restrict Cloak
Raiden
Thunder God: Change ability into a speed ability 1.25-1.35 max
Thunder God: Change ability to a ward ability; 1 ward, 20-25 damage every 1.5-2 seconds at max level
Raiden's Wrath: Change to a passive 0.5-4% chance to strike an enemy with lighting instantly killing them or dealing heavy damage; 70-150
Hell Hunter
Fire arrows: Remove burn and double the damage over time
Fire grenades: Increase the area of effect by 1.5
Chameleon
Bash: See Human Bash
Entangle: See Human Bash
Hell's Demon
Restrict: Shotguns and P90
Magician
Shopmenu: Restrict Ring or Clock
Shadow of the Void
Deaths Shadow: Double the damage
Vision of the Void: Double the duration of the blind
Vision of the Void: Increase max chance to 30%
Eye Ra
Lens of Truth: Fix?
Summon: Add a range 3-4 times that of Orcs chainlightning( ~150 feet)
Nebula
Proto Star: Reduce max chance to 35%
Nebula: Reduce invis time to 3-3.5 seconds
Die Xonvert
Blood Lust: Change to 15% chance to do 10-25 damage and gain it yourself
Freeze by Fear: See Human Bash
Beast
Burning Beast: Change ability into "Raging Beast" 5-10% chance when hit to give full ammo and 10-15 HP
Rapscallion
Blades: Switch with Vagalion's Blades
Complete Invisibility: Remove cooldown
Complete Invisibility: Remove current animation and replace with Vagalion ultimate visual.
Athena
Medusa's gaze: Triple the cooldown
Medusa's gaze: Remove the tracing visual
Medusa's gaze: See Human Bash
Medusa's gaze: Half the freeze time
Medusa's gaze: Decrease range by 25%
Shopmenu: Unrestrict Lace
Dragon Fly
Blood Loss: Double the damage and increase the proc chance by 10% at max
Shopmenu: Restrict Ahnk[Needs to also be made so that one can't get the weapon, die, changerace then buy ahnk. Perhaps making Dragon Fly changerace only when you next spawn]
Jack
-Will do when I'm next on the server can't remember skill names-
Vagalion
Flickering shadows: Remove and deduct levels from race's total level
Blades: Switch with Rapscallions Blades
Levitation: Change values to 0.8-0.4 of normal
Complete Invisibility: See Vagabond
Santa
-Will do when I'm next on the server can't remember skill names-
If you have any question about why I suggest something in particular please do ask and I'll try to relay why I think the change is fitting. Also others feel free to add other suggestions to the list or change my suggestions a bit.