Quote from MF_Alex
What is there to stop players from just respecing on-the-fly?
"Oh, Diablo is hard to fight with fire." *cast Recall Stone* "Ok, respeced ice. Cake"
Idk, just seems like a lot of the challenge will be gone once websites have lists of the best builds to fight with for each boss encounter. Use X build for Y boss.
There was a post from Bashiok discussing this. They don't consider it a concern, because if that's how a person has fun playing the game then that's great - they've made the game more fun for that person. But they expect most people will stick with what they like and create an 'identity' for their character through their skill choices and just try to overcome the challenge with what they have.