From what I have observed, I think reducing the minimum payout on Eligius pool has negative effect for miners with hash rates above 1 TH/s as the waiting time to get the payout becomes longer than the time to mine it. That is because the average number of blocks that Eligius pool solves per day is below 10 blocks. The only way is to raise the pool hash rate by attracting more miners. But I am not really sure how to achieve that.
I think by now everybody are aware that mining is not profitable. Along the time I have seen more and more home miners step out of the game. In the end the idea of decentralise control over Bitcoin will just be a dream. I am just a hobbyist miner with low hash rate, little budget and high energy cost. But I still believe that the idea of decentralisation is very good. I am really not sure though how millions of miners like me can compete with a handful companies with high budget, to keep the idea of decentralisation going.
As the network grows more and more centralised, this seems more viable to convince others to do.