I'm not sure if these are things that have been changed or not, but it looked to me like Abe's running was slower and much more in line with his AO/AE speed. Also the camera seemed much tighter to him. The camera always looked too far away before, so this should be much better for seeing the HD models
I think the new flipper sound for Munch is better, but I wonder if that will eventually become annoying too? In my opinion it should be quieter and less noticeable, more of a background noise than a sound effect. To contrast, I don't take any notice of Abe's footsteps because I expect to hear the soft 'thud' noise, and it blends into the general ambient noise. Munch's sound feels a tad intrusive perhaps.