One thing I don't like is that saves are static numbers, and the attacker always rolls. I understand why mechanically, its cleaner and more streamlined. But as a player and a dm I know that players do NOT like their characters messed without some ability to save them. Mechanically its doesn't matter that the dm rolls a "reflex attack" instead of a player rolling a "reflex save" but to the player's perception it does....a lot.