#5: I didn't say anything was bad with the crit weapons themselves. I said they were broken with the degreaser. I even said this specifically, and why. The flame+sting combo w/ degreaser is faster than any other two hit kill in the game(sans the FaN and SP, but they don't count, for various reasons), and you don't need to be precise at all, so it's completely consistent given you're doing it against someone who isn't tiers above you in skill. Throw in the airblast and, given how source engine's input prediction works (badly), you can make it extremely hard to hit you while you do it as long as you're in an enclosed space (half of TF2).
I think that the degreaser should reduce all crit damage by 25-33%. That would make the critwhore combo reasonable. Personally I would just make it impossible to play with either crit weapon comboing with the degreaser, because they're more broken (not OP, just broken) than even most of the polycount sets.