Personally, I think it should stick to having a GCD. To be frank, Unleash Flame and Wind seem to be designed for Enhancement, not Elemental. If it was meant for Elemental, then they clearly failed, unless their only intent was adding an extra button to push when you're on the move and your next spell is going to be either FS or LvB. I doubt they'll make UE do more damage, because of its purpose in Enhancement, but giving it the chance of procc Elemental Overload would be interesting. Either way, I still believe its an Enhancement spell, and until otherwise changed or announced, Elemental players aren't going to be happy with it.