Don't you think .05 BTC as payout threshold is a little bit too high ? Its seems too me that one need a serious ammount of hashpower to reach that in accepatable time. But I quit mining some months ago so I'm not exactly familiar with the current situation in mining. Just an impression.
it can be changed in 4 keystrokes. it is just set there until i actually figure out what im going to do / how trading fees will affect profits of miners