I agree to some extent funball. But on the other hand, and speaking as a hybrid, would it be fair for some classes to get 3 sets in the same amount of time as other take to get 1?If they make the drop rate higher for hybrids, the current distribution would be pretty good.
The class distribution on their token system is so bad currently I'm surprised they haven't changed it. Having 7 sets on one token and 3 on another means that there will be raids going back for alternate sets, and yet the hunter/warlock/mage pieces will rot since they'll have their sets already.
We've always used a bid DKP system (I know a lot of people were using zero DKP). It was a problem in Naxx to have Warriors bidding on a tank set against rogues bidding on their only set. Same thing with Druids/Paladins/Shaman bidding against hunters.
If the drop rate is NOT higher for the hybrid sets, then yes, it could potentially be pretty ugly. I know a lot of our hybrids want a non-standard set, if not more than one.
I think the problem was exacerbated pre-expansion by the fact that hybrids had 1 role in raids (for warriors it was tanking, everyone else it was healing) while post-expansion it's looking as though a hybrid's role is based on how he gears himself and how he is specced. So you can gear yourself to fit your "role" in the same time a warlock can. And assuming a relatively even distribution of classes on your raids and equal attendance, if people focus on a single set, everyone will complete a full set at relatively the same time.
If you're sticking around farming for secondary sets for your hybrids, that's when the issues come to light. I don't really find it unfair that paladins for instance are in competition with rogues who only have one set, because it's not the rogues that will be taking my spare tokens once everyone has their first set. I'd be more cheesed that I have to divide my tokens with the shaman while hunter, mage and warlock tokens are rotting.
As long as there's enough cool non-set items spread around I don't think keeping your single-set players coming around long enough to let your hybrids get multi-sets. I mean, the rogues might want to stick around to get non-set pvp gear or rare weapon drops while I'm picking up my DPS set. That and the fact that the set is only 5 pieces makes me not so worried about distribution.
Assuming a fair DKP system I'll get 1 set of my choice at the same rate as everyone else. If I want an off-spec set I will have to take it in addition to my main set, as any other class would have to. If I want to focus on a single set I will get my gear just as fast as those classes like rogues, who don't have much reason to pick up more than a single set.