Finished the first 2 levels.
First impression: It's not QUAKE 4. It's DOOM 4.
I can't make out any perceivable resemblance to the Quake series at all. It's completely DOOM3'ed out. As far as I'm concerned, it's a DOOM3 expansion pack. Dark, muddy and console-like. Needless to say, I'm disappointed. They need to scrap this engine ASAP and start from scratch.
Well, it's not all bad. At least they integrated a flashlight into the weapons.