Seriously, we had many patches that were rendering builds completely useless, which was not a problem since most of the players were playing until lvl 31 and then retired. However, I notice trend that many, many players are now grinding to the max, often reaching levels 33 and above.
I believe it's inhumane to make someone retire at lvl 34 or 35 just because you made his build impossible to play.
How about it? Each player to be granted one free respec a year? Just to compensate sometimes unpredictable patches and "balances".