What’s the solution?

IT IS EVEN WORSE THAN THE CHART MAKES IT SEEM SINCE ANTPOOL, VIABTC, F2POOL, BINANCE, BRAIINS, AND SECPOOL ARE ALL USING THE SAME CUSTODIAN AND BLOCK TEMPLATE PROVIDER. BASICALLY ONE BIG CHINESE POOL AT ~47% HASH.

This is not an issue in my opinion. Pools does not represent a single entity. They are composed by a lot of miners, right?