So here's my two cents.
1. Repair bots are a stupid idea for the reasons everyone else stated below. Just what I need is to lose a slot in my bay for an ambulance that will get capped as soon as it shows up to rescue someone other than myself. Why not make a rescue drone that you can call once per match that would heal you, say 25% and then fly away. (Make it a non-player support character.) Might be fun to be able to target them too.
2. Until tanking is fixed (yeah, like that is ever going to happen...) then no amount of bots, weapons, maps or other fluff will fix this game.
3. Workshop 2 does sound interesting but I always have a "wait and see" attitude with anything Pixonic comes up with.

Just another thought... Instead of a repair bot why not a repair module. It would take up a weapon slot and s l o w l y repair the bot. Say 1%/second.