This is one of my posts in another thread.
As they get higher level I find myself spending more time thinking of how to use feats for their enemies than on other more productive things. "ok Mel the 12th level Fighter is attacking, well he has expertise, power attack, great cleave, dodge, mobility, etc. Well he's attacking with a +4 to damage and -4 to hit, he's using expertise for a five points of ac bonus and the resulting mod to hit, he's in a flanking position with Jimmy Joe the Fighter and is charging so that give him a total bonus of +4 to hit on top of other mods and he has a total of - something to his AC...Oh wait, that was Jimmy Joe who was using four points of Power Attack! Mel has the improved power attack feat so he's using a plus 10 to damage, hold on let me recalulate...damn and I forgot Clem has the dodge feat! Doh!"
I'd rather just do this, "Mel charges across the room and attacks Clem the Magic User. He rolls a 13 plus his attack bonus of +4 with his longsword for a 17, that hits Clems AC of 6" He wasn't opportunity attacked and I wasn't forced to consider feats and situational mods. Sure some may enjoy that extra level of detail, hell some folks just love Champions, but I'd rather go for a more simplistic system that runs faster.