That is not necessarily a problem - the goal of a project is to solve a real-world problem, not to be "ideologically pure". Steem is itself a consortium of the top witnesses who are the trusted third party. Ethereum is even worse - Vitalik concentrates more power over his "baby blockchain" than Xi Jinping over China, or Putin over Russia.
"Decentralization" is not my focus. The litmus test, for me is: do you improve the lot of everyone by making possible things which were not economic before? Do you create value?