Actually here is the balance change I was thinking for this race. As we know you get awarded more xp when killing a race of a higher level. With 8 levels per ability its max level is 32 which is the same as the orc and other base races. This means that when killed a fully leveled spiderman will give the same amount of xp. If the leveling were raised to 10 it would be 40 and all races that cap out under 40 would revive the bonus for making kills even when maxed. In addation it will also increase the difficulty leveling the race.
In the past the levels per ability did not matter as much except for the largely unbalanced races it did not effect balance. This is becuase there was no max level you could reach for a given race back then. As a result we may need to dramatically increase the max level for these higher races in order to balance them correctly in the new version.