You know your idea might work, i like that idea, where do guys like you come with these things!

Steal it from Sony and Nintendo.

Personally, I'm a fan of the turn-based system and think it impractical to incorporate motion controls into every action. So having motion controls just for the special moves seems like a happy medium.

They may even include motion controls for magical attacks. I.E. Drawing a lighting bolt over an enemy causes a lightning attack, a line under the enemy causes an earthquake attack, a circle around the enemy for a gravity attack, etc. Who knows what they'll come up with. But I'd prefer no motion controls over poorly implemented ones in JRPGs.

Anyone have any other ideas?

My ideas are crushed compared to yours, lets just hope, that The Wii and PS3 does it!!!