If you think #bitcoin is centralized in terms of mining now, this is nothing compared to what it can be when you add large blocks.
I'd be interested to see your mining cost model, that allows you to claim that moderately larger block sizes invariably leads to greater centralization.
You were refuted:
Bitcoin IS bugged/flawed in its current state for processing transactions.
And
Bitcoin Unlimited is even worse. You don't understand the technology, game theory, and economics of unlimited blocks.