alright i will do some editing to my above post :
"I'll be back" is going to the future, obviously these minor concerns such as defusing bomb or wtvr would be taken care off by making it FOR EXAMPLE that the race would be "frozen" above ground so that they cant plant or defuse the bomb. the skill is made for strategy purposes. but for the sake of argument, u can make the race still vulnerable to ultimates , like a chain lightning nearby or wtvr, and have the invulnerability only be against non-race-skill damage. if thats not enough , i'll try to see how it works without it
scribs, vaga can teleport anytime and become invisible, but he can still knife or deactivate ultimate and do it again.
when u;re stuck for 10 seconds wITHOUT moving or knifing or shooting, u cant do shit, if ppl were in battle with u they can target u on radar, but they could wait the time to shoot u since u cant shoot them... its like a molecule shield without the ability to shoot, and a vaga invisible without the ability to turn it off at will... plus u only got 5 of those to use carefully.
as for the reboot thing, the numbers are a sample, i agree with scribble and mikey, it should be both reset to 75% and have a smaller time, say ~10 secs (in between average number) and obviously u get more % of ur stats back the more u level it .