Pros:

1.better animations. 
2.melee holding is fixed. 
3.able to use with others coach's skins.

Cons:

1.Maybe it isn't author's miss but when you're holding a melee , your weapon's barrel merges in (his ass) coach's body. With pistol it's ok!

Conclusion:

Yeap. finally!  Perfect! Well done. It should be at everyone who plays L4D2! (sorry for repeat. just for rate!)