So I remember this being talked about a while back and Zark expressing he did like them. For those who didn't read the thread, the basically detailed that saboteurs could be sneaked onboard an enemy airship in which they would then disguise themselves as crew, and bomb important targets. Crew would also get a detection chance in which they could discover the traitor in their midst in which case they Saboteur would convert to a regular boarder with a revolver. Are those guys still coming Zark? Also, this idea was pretty rough when first conceived so it could probably use some polishing if anyone's interested in that.
Yes. This exists.
They're called "Spies".
Interactively in-game the unit would have to be insanely expensive to be balanced. Or the unit simply progresses from vital to vital until discovered.
This is a troop.
Yes, well... Zark mentioned that a saboteur could be placed as a special job for a spy. And what you said above would basically be how they worked in game, yes.
Right. But it does exist in-game via caltrops.
To get it in-game multiplayer... the troop would be bomb.
Balance issue, but bomb.
Eh, you're probably right. Couldn't hurt to ask, though.