Change the way most improved monthly works.
It shouldn't been meassured percentage wise, but rather point wise. The monthly leader one works right with the powerscore. But the otherone seems really unfair, a player can earn 800pt start with 800 and improve 100%. While some other may start with 2500 and finish with 3500, but be below percentage wise while in all seriousness improved more than the first example.
It will be more fair to everyone and discourage some point manipulation.