See, "crazy" doesn't sound like "fun" to me. These are the types of things that conceptually turn me off of a game entirely. Sort of like I wrote off SOTC when I learned it was just a string of boss fights, or Killer 7 when I learned you had to be on acid in order to enjoy it. These Resistance weapons sound overly "gadgety," and I don't particularly care for that.
I don't worry about weapons being a differentiator. I value differences in settings, plots, etc., and it seems like Resistance has enough of that to make it stand out from other shooters already. Why they have to throw dumb weapons on top of it, I don't know. I recognize it appeals to some people, but I don't understand why. Then again, I don't like most things most people like, so whatever.