The merits of console vs PC aside, and despite the occasional bug, I'm enjoying this game.
Imo it's far better, gameplay wise, than Doom 3. There are more things to do and a variety of gameplay types within the game. I haven't had a chance to try any of the minigames yet.
After u/g drivers I've had very few gfx glitches, performance is good, the vistas amazing. For some reason multiplayer (Legends anyway) doesn't run as well.
Legends does add some interestng back stories to some of the NPCs. It would be nice to have a series of maps as part of a campaign ala L4D though.
I find the FPS enemy AI better than average. They are good at finding and using cover, flanking, charging, and retreating. The car AI seems unremarkable. They will use powerups etc.
I think I'm about 1/3 of the way through the game, so my opinion could change, but I jsut don't see that this game is as bad as so many people claim, some of whom clearly haven't bought the game.