I'm unsure how to feel about the change. I like the idea of maximized damage on a critical hit. There have too many instances of rolling and confirming a critical hit just to roll a couple ones or twos for damage. I also like the idea of getting the extra magical damage from weapons.
I also like the talk about getting rid of critical resistance in monsters. I hated having to buy weapon crystals so I could get crits on undead and constructs.
The thing I don't like is getting rid of threat ranges and this new, unexplained critical hit modifier on weapons.