about 31btc in fees went through in the last 24 hours with 144 blocks a day it works out as about 0.2BTC per block average.
to me once you spread it out between 100's of workers it does not represent much of an incentive, which leads on to the point of is transaction fee's really that important right now or are they just irritating people that want to send small amounts.
afterall its less then 1% of the block reward, knowing how pools work the workers probably wont even see a +1% increase in payout due to fee's.
i personally think fee's should come out when bitcoin is worth $1000 each and the block reward is under 6.125BTC