I'm waiting for the next MMO aswell, and it is quite highly possibly an ACTION MMO due to the style of approach they are taking with their other FF titles.
Besides the current style is a WoW clone mostly.
So if anything this style of gameplay is vastly overused and boring.
A ton of Free to play MMOs use the same gameplay mechanics as this game (Minus combo which doesn't really affect anything as you still got a specific combination you do)