That said - sometimes, I LIKE difficult targets.
When I figured out an attack chain that let me take out a level 50 Blaster (with a melee-range "slowing" aura that made ASing him out of the blue impossible) without using any inspirations, I was pretty proud. When I can Axe-kick a flyer who thinks he's safe out of the sky, and break him before he can get away, I feel happy. Frankly - I generally don't LIKE one-shotting people - my favorite Inspirations are Yellow (since I hate missing) - not Red. If something is done to remove Stalker one-shotting abilities - even so far as a "damage cap" on AS when it comes to PvP combat (no more than 80% max HP, or so) as long as they improve their all-around combat abilities, hit-and-run tactics, defense, and overall utility, I'll be very happy. I have more moves than just AS - and I enjoy using all of them (as well as using AS to the best of my abilities - I'm not ABOVE popping a few reds and one-shotting or two-shotting someone - I just don't like it).
Also - Assault does have an effect on Placate. I've had Placate do "No Effect" before in PvP combat. It's not 100% resistance, but it DOES give you a chance to be unaffected.