8 way moving is an issue. Period. There is no sugar coating it. But its an issue that can be worked around and dealt with. Here is where I really see it. Lets say I run a toss to the right and I am running up and slightly diagonal, I see nothing but paydirt so I just want to change direction and run straight up. If I dont carefully rotate the analog stick until I am facing up and then hold up, the runner will kinda stop, pivot, turn, then go. The only reason the defender doesnt catch me is because he does the same thing EXACTLY when I do it.
The problem with this is, sometimes when I want to turn the corner really fast, I dont have time to "carefully rotate the analog stick until I am facing up and then hold up" and the stop, pivot, turn allows the defenders to catch up. Veterans of the 2k5 series are used to this and dont have the problem, but newcomers will find themselves all over the place if they are not careful. There should just be a natural kinda curve when you run around the corner, or around a lineman (when blitzing) and its just not in this game.