Ah, I missed the running, my bad. I've played again now.
The running speed is just fine, though I had a few issues with the left analog stick (this could be down to the age of my controller though), at some points it seemed to act like a toggle run mode (pressed it in and the run stayed a little while after releasing), at others it worked like 'press the stick in to run'. Don't take my word on that though like I said it might just be this old digitech controller, maybe see if anyone else notices it. Maybe L1/R1 hold down to run would be a good possible alternative if you need one.
Yeah the zombies got me several times from blending with the shadows, pretty sneaky but doesn't feel unfair, I agree having them lunge at you would be awesome though!