I get what you are saying, but that wouldn't fix people spamming actions, as well as healing. As a healer, on this system I wouldn't get any SP for my actions. While I would get from the party split, I think you'd see players equip healing spells, and drop a healer from the group so they don't have to divide the sp by another player who isn't killing as fast.

If they were able to find a system that worked, sure, but I think what they have now works, better, and with the changes in the battle system fast approaching, this all might be a mute point.

I guess we will see what's in store.