One of the reasons I hate the argument that pure DPS classes should have dibs on top DPS weapons is that in order for me to play a character that uses a two-hander, I have no choice but to play a hybrid. In fact, in order to play as melee DPSer at all, I either have to play a rogue (all three rogue trees dual wield small, fast weapons) or a hybrid. Those are my options. If I wanted to play ranged DPS, I could pick from one of three possible pure classes, but if I want to melee, I'm forced to either give up the weapons I enjoy and take up a playstyle I don't like or accept that I will be forced to DPS at a penalty and be expected and/or pressured to tank.
This to me is asking me to pay twice, and it's unacceptable. Last week, Ghostcrawler posted an excellent discussion on class and role that I highly recommend everyone check out, and it seriously has me pondering what design I'd prefer for World of Warcraft and indeed how I feel about classes and roles entirely.