Still has potential. Though, as others have said, it seems to lack the weight a Space Marine should have. That and it looks a bit slow compared to the awesome concept trailer.
Also, it looks like they've given up on the squad idea, which is a damn shame. Misses the whole Battle Brother concept a Space Marine is based around.
Makes the game more like God of War as opposed to Gears of War.
A few other niggles;
The Chaos marines look like they're going down easy. Missed chance for some worthy opponents and squad based combat. Plus it kinda classes with lore a little.
The Lascannon was sadly tiny.
I hate Mary Sue Ultrasmurfs. Curse you Matt Ward.
Haven't heard anything about the promised RPG elements yet.
Otherwise, pretty good. The guns certainly look powerful enough, and they've finally made a game where the Space Marines are as powerful as they are in the lore. +1 to Relic.
Predictions:
I suspect this game will be good, but thin on features.
So 7/10, 8/10s all around.
Then, if successful enough, the sequel will make it the game it should have been.