I'd like to see the scout's crit-a-cola upgraded to an invincible, permanent crit cola. I'd also like to see the sniper get a satellite lazer that he can control from earth. Lastly, I'd like to see the engineer be able to build a moveable tank using just 25 metal, a tank that has the HP of 10 level-3 sentry guns, and the firepower to kill any enemy instantly.
Demoman:
Nuke Launcher
Because I feel he's not OP enough.
Your sig isn't OP enough.
No wait. I take that back. It definitely is.
The engi needs a battle chair that hovers around and protects from backstabs!