@arbitrarywater: For starters It looks really nice on the smaller 3DS screen and as someone that is quite fond of the 3D effect I found it to work pretty well in the confined ship hallways. The door puzzles and especially the fingerprint scan really benefit from being on a touchscreen also, the Wii U version will probably be the best of this new version due to that.
I'm also not the biggest fan of the way they have changed some of the leveling in Raid. All the extra achievements that would pop at random and the ability to buy a couple of free guns with the system coins make it seem like getting to level 50 would be far more of a grind. I'm not entirely sure why they have taken that out as it was one of the things I liked best about it on the 3DS. They have added a bunch of markers in the missions to get extra BP, but BP is so easy to gain that they don't add anything at all. It was nice that you were always gaining experience for killing 100 ooze or 20 dogs or whatever.
I've played maybe four or so hours on the PS3 and have found very, very few people to play Raid with online. It's still the best thing about the game, even after nearly thirty hours of it on the 3DS I'm still really into it. I think parts of it look absolutely horrible and am not really sure this is the best version of the game for the single player despite there being a better frame rate and a lack of the awful loading stutters when you transition to new areas. It's still a cool game though. A year ago I could have sworn it was better than 5, but after playing through it again I'm not entirely sure of that now.