Killing restores half of the lost power? Killing is the only way to regen power? <This would make pvp essential.
And every single person that uses PvP cheats to get even one kill entirely takes power from the system. Not to mention power-losses from environment and mob damage. It would be like trying to keep a steady supply of water in a giant sieve.
P.S. Got a new topic for this, so we don't have to look at the flame and rage of this thread. Also helps to start with a clean slate after awhile.