the game feels a liiiittle smoother, mostly noticed it with fox, where his SHDL is just easy now and not baby-easy like it was in 2.5, ganon needed that up-tilt (although i think he should have a better, more "destructive" animation, or at least more beast-like), I have to say i'm very very impressed with MK, just with the first impression he feels great and it feels like i actually have to think with him, while still being a really good (and boss) character. Link's boomerang animation looks off and could really use some sprucing up, bc it really looks wierd, Sonic actually feels like a character now and not just a three button combo=WIN, he actually has to use his amazing speed to outmanuver and take control of the stage effectivily without the need to spin everywhere, also impressed.
I'm a melee guy and i never really looked at lucas's moveset animation in Brawl, and i have to say the new animations look way cooler (and seem to be better aswell, i have no idea, i just like it more), Lucario feels really good now, and that new f-tilt animation.......GOD you guys realllllly outdid yourselfs with that animation, it looks amazing in a string of combos, much more pleasing to the eye, cpu in general seems a little bit better, snake a little cooler with grenade+up-smash angle, uhhhhhh oh lylat is actually playable. that's it for now i guess
From what i can see and what i think, this demo is just to test run the changes made on a much bigger scale (mostly MK and sonic) and the next (please 3.0) might come out in december or early january, and also to tease us for the real release. Once again a great demo, but i think i'll just keep on waiting for mechanic changes and new features. Still though, really impressed with mk, like really impressed, might main actually