After what I saw in the demo, I'm mostly pleased with the way the game is.
Of course there are graphics problems and such, but like KoRny said, It's most likely 'cause Demo'.
I highly doubt that even EA would release a full game in that condition.
I loved the cinematics and the ending of the first part of the demo made me literally cry, so, I know ME3 is going to have that emotional depth that ME1 had and ME2 lacked most of.
I liked the reworked combat alot, and I liked the new flair to Biotic abilities.
Last, I'll backup where I said 'cause demo' with the fact that I was reading about the content of the demo -months ago- when those things were all rumors, so I'm sure they probably didn't use a final version of the game to cut the demo from.
ME3 looks, and sounds like it will be a lot better than ME2 was. And even ME2 was still good, though nowhere near ME1.
Not to judge too soon, but if the whole game is like the demo was, it might even be on par with ME1.