You don't want high hashrate ?!
Well we can also just put a hardlimit per user on the pools like with RevoCoin, LimiCoin etc..
But how does it makes sense to fork/change algo of the coin as soon as it is accepted and people mining it ?
Thats like you change the recipe of Coca Cola as soon as people like it and drink it
Care attention the possibility of existing GPU miners as people suspected, won't hashing rocketing be sign of gpu? that's most people's concern.