AI is the worst thing about this game. The graphics are just fine. I was perfectly content playing games with smiley faces and letters as a kid, so I really don't care if a game isn't visually stunning. And I don't mind the "leaning" all that much. It doesn't make sense that you can't walk around while zoomed in, but it didn't get in the way of me playing the game. I normally just use it when stationary anyway, so the leaning is quite nice to have, although I really think they didn't need to make the sacrifice. If it stays as is, a lot of people will have to get used to it lest they want it to put a damper on their running and gunning.
The little ammo/health/whatever circles that drop are pretty annoying. Once you're maxed out, they litter the screen like the Gay Pride Parade or Mardi Gras just rolled through town. It reminded me too much of Borderlands, which is rarely a good thing. Also, it bugs the hell out of me that you can't see the character's hands most of the time. When reloading, a new magazine just magically floats into the gun. And the knife is magical too; it can cause brick walls to crumble with the greatest of ease.
But like I said, the AI is the worst part. I would sit there and snipe guys (with a machine gun, mind you) while their buddies just sat idly by. Half of the time, they only responded if I shot directly at them and didn't kill them right away for whatever reason. If I was far enough away from them (to the point of my crosshair not turning red), I could even hit them and they would just stand there as if nothing happened and then subsequently fall dead. I don't mind that the enemies and the boss were ridiculously easy to kill because really, I don't need much of a challenge in order to enjoy myself. But it might be nice if they acted as more than just sedentary targets. If I wanted to shoot fish in a barrel, I would...well, I'd shoot fish in a barrel.
I had no expectations going into this because I only knew the game by name and I had completely forgotten who the developers are. But even so, I have to say I'm disappointed by the production values. For the sake of the customers, I hope the QA team is hard at work on this one.
EDIT: I just realized that this is supposedly coming out this month, which seems unreal considering the lack of polish. If that's the true release date, this has most likely already gone gold. If not, they need to delay it drastically.