Yeah uuh the whole "This is totally like a movie guys" feel of the thing kinda bothered me. Aside from that, I guess it does feel 40k-ish, though I still can't comprehend this weird obsession of making bolters sound like regular machine guns. Also, it might be just me, but the Space Marines looked and acted a bit too much like....well, marines in space. Which shouldn't be a problem in any other franchise, except 40k Space Marines aren't your regular "yehaw America fuck yeah, let's rock boys!" marine - they're religious warrior monks with fanatical devotion to their God Emperor. They don't "Save a few orks for you".
Edit: Also, while I personally think the Ultramarines are kind of an obvious and rather lame choice here, I think we all know that the best Space Marines for this game - The Angry Marines, aren't canon.
Edit: Also, while I personally think the Ultramarines are kind of an obvious and rather lame choice here, I think we all know that the best Space Marines for this game - The Angry Marines, aren't canon.