[@MelonHead]I particularly agree with Preps being allowed to be 'strong hints', rather than a complete mapping of its effects and intentions. 

Balancing is important, but wouldn't a faster moving object also have more energy(assuming it also had decent mass) and therefore more power? Speed sacrifices maneuverability(particularly for characters, since laws of motion apply) if anything. I could agree that something becoming harder therefore becomes less flexible and such, though.