Surplus would be nice if removed, adding a system that mimics FF11's chain feature would be encouraging for the "non-casual" player base. Allowing the player base to enjoy the game with out limiting their progress.

Even if they lowered the SP gained outside of Leves, then implemented the chain feature to increase the amount of SP gained. this would be slightly more rewarding then say... being held back if you play to much (Grind SP)

Would also encourage group play and faster kills, I for one enjoyed trying hard to get that higher chain number