If you do it like that, then you only have 9 slots compared to the 30 we have now. For me, your layout is a bit limiting for when i want to look around during battle and how do you see yourself move around the target during battle? I mean, we only have 2 thumbsticks. And what about the flow of battle, does inputting a command going to pause the game or something? I don't mind pausing once or twice but to do it everytime you have to do an attack is quitte bothersome. Lastly, where is this grid going to be on the screen and how big is it?

Its a nice idea, but the actionbar seems to be more functional in both options and looks.