Non-sniper infiltrators- with there be a TF2 spy-style role?

[Triforcer]

I love stealth classes but hate sniping (I can't even headshot non-moving targets most of the time).

Based on the information we have so far, will playing a close range infiltrator be viable? What I want to do is carefully stealth around the edge of a battle, get behind a few infantry firing in the opposite direction, and knife or pistol them from 5m away.

Obviously the game needs effective countermeasures if this is possible (stealth see-through or revealing talents, decloak noise, decloak turrets, etc.) but I am wondering if there will be a place for this in PS2.