Though now that I think about it; CNJ works in this way. You can have a two handed weapon or single+shield. However, in most cases the two handed weapon is always more effective with no actual cons to it. (I'm thinking, Dark souls, when you wield a two handed weapon you are significantly slower) There are no PERMANENT speed changes. Perhaps with the introduction of rogue/ninja they'll look further into speed bonuses and what will effect it. I really do think it'll put FFXIV:ARR into a different ballpark though; and whether that'd be good or not is beyond me..