Just some thoughts...
I think that the idea of lucky mining in order to decentralise mining is a very good one and will atract a lot of people.
However, the real problem for decentralising mining lies in making more simple the mining procedure for people with limited IT knowledge.
Personally, I want to mine but it is impossible for me to understand how to do this. It requieres a lot of time, which I unfortunatelly don't have, to go around forums and ask for instructions and explanation how to do things. It is very difficult for simple people to understand how to create conf files, what they do, what are the nodes that you mention, where and how to put the different commands and all that...
If you really want to decentralise mining, you will need to come up with a solution and with proper analytical instructions that one can easily read and understand when they download their qt wallet. It should be as simple as with a click of a button. The user should be able with one click to choose between the different mining options available...
If you guys manage to make simple the process of mining I can assure you that a lot more people around the world will mine with their pcs whenever they open them... Personally i have been thinking for the last 6 months to buy a new pc and some GPUs in order to mine cryptos but I haven't done so far since I wouldn't know how to use it.. Try to make mining easy for everyone and and then you will be able to decentralise mining for real...And then cryptocurrencies will trully rule the world and people will forget to use fiat currencies..