It would be more interesting to discuss new flaws in the protocol, or things that generally haven't been discussed before.
Large miners do have power, the power to destabilize the system. The same power large POW syndicates have that delays POS will be there in POS only in a more direct literal way.
What do you think will happen if a more decentralized verification system will be proposed once there are people and institutions that will have large sums of invested money and effort? do you think that they will just give away the financial power they have? this is not how any system involving human works and cryptographic technology is not going to change that.
How is a system that allows people with ~$30k to have any type of influence worse than the status quo?