I find it to be worth it, not for the gen or the bonuses, but simply because I like trying out new builds and actually enjoy not being level 30/31.  I feel that trying new builds on my main is different than trying them on alts, though I'm not really sure why.  I do know I have alts who are way better at certain things than my main is, even with the same build.  (Especially my one-hander.  Braeden sucks at 1h fighting.)