What you call centralization I do not. I want Bitcoin Core developers to continue to develop Bitcoin. They have done a mighty fine job so far and long may it continue. They are all volunteer developers and any developer who is interested can join Core and develop. Some are paid by Blockstream, more are actually paid by MIT. I don't mind who pays the developers, but I think it helps keep a good continuity to have some really good paid developers. A Bitcoin without the developers that have helped get it this far would be a disaster and surely be the end of Bitcoin in all but name, the price would tank. Core developers have built up trust, no other set of developers have that level of trust yet, hence Bitcoin market cap is way higher than other cryptos.