The problem isn't that it would be complex. The problem is that theorycrafters would quickly determine the "best set" and the elitist core would refuse to play with anyone who did not use that exact set. We already have a situation where people can vote-kick just because the tank refuses to do a speedrun, or the healer refuses to contribute DPS. Blue Mage would become all but unplayable unless players stuck to the "BiS" loadout. -That- is what Yoshida is trying to get across in what you quoted. It's the same reason that the elemental wheel was abolished; people would be forced into playing exactly as the rest of the raiding or even DF community demanded, and Yoshida does NOT want that sort of situation to arise any more than he can possibly prevent it.