OK, dual wielding pistols clearly breaks purist's immersion. It's too flashy.
How about instead we add a VERY BIG HAMMER that makes people fly back, I don't know, 10 METRES AT LEAST! when they are hit in head with it?

Oh wait, it's already in game (and always was). My bad.
Suggesting that Fallout is dead-serious post apo is simply wrong. Fallout always had less serious elements. And FOnline is even less serious with all the, let's call it "player contribution". With PvP there is so many elements that break immersion, that I really doubt shooting 2 pistols at once by some people would make any difference...
Some of you reacted like I suggested fighting with dildos.
It was a suggestion to make pistol fast shooter a less crappy build, not to make the game more flashy.
I hoped for more comments about the mechanics I proposed...
It's true that there is no animations, but with 3D models it wouldn't be a big problem.