As a fan of the original, I'm still waiting for reviews. My issue with it is they are only adding one new element and no new weapon classes (not sure if thats the right word, I'm talking like Shotguns and Revolvers, not a model or manufacturer). I mean that was always the fun was getting the awesome weapons. If I already have an electric rocket launcher or whatever in the first game, getting it in the second will just not be that exciting. I just feel like they missed so many opportunities for different types of guns and stuff.
Off the top of my head they could add elementthrowers (like flamethrowers but not just fire), grenade launchers (most would be arc projectile launchers and they could even be effected by grenade mods), and crossbows and for elements they could add Ice (really surprised they aren't), Fog (would be sort of like a smoke grenade), shrink (lower armor, smaller target), and growth (higher armor, larger target).
And those are just my more reasonable ideas. Borderlands has always been a bit out there so they could do crazier stuff no problem. I mean they could have a flower element that has flowers grow out of them or a mutation element so they get extra heads to make crits easier (although modelling for this would be hell). Or they could add a weapon class that is like a slingshot. Those ideas are silly, but I don't think they would seem that out of place in borderlands.
And the new classes kind of bother me. Somebody has a turret again, and that assassin guys invisibility sounds a lot like Liliths ability. Although I will admit, the duel wielding looks like a great idea.
Hopefully I get proven wrong. I really enjoyed the first game and I think the second could be just as good, but I'm worried that Gearbox forgot what made the first game so fun. I will wait for reviews and what not before I buy it.