I presume that you did not read the posts I linked earlier that I wrote. In there I explained how increasing the blocksize, does not increase the barrier to entry of mining whatsoever. Miners do not even run full nodes themselves for the purpose of mining, which is why the increased difficulty of running a full node does not increase the difficulty or barrier to entry of mining. I am a miner myself, solo mining is only feasible if you are a huge industrial operation, not exactly contributing to decentralization. P2P mining unfortunately is not good enough both due to the increased complexity and incompatibility with certain ASIC miners, this is reflected in the hashrate. More then seventy percent of the mining power is presently inside of public pools, this is good.

https://bitco.in/forum/threads/gold-collapsing-bitcoin-up.16/page-203#post-7395
https://bitco.in/forum/threads/gold-collapsing-bitcoin-up.16/page-208#post-7550