I don't like the idea of a repeatable quest for this simply because it is not in tune with the game. You not supposed to be able to constantly change your spec in diablo. You built a char and you should stick with it. They make this game very repeatable so you can try out as many different builds as you want. There should be some imperitive to build your class correctly instead of leniency to mess up. Not only is this in tune with diablo but it also helps weed out the not as smart players. This game is as heavily reliant on the correct build as it is the gear.
http://www.bingegamer.net/index.php/2008/an-open-letter-to-diablo-iii-fanboys
So true...