The centralization and PoS makes Ethereum unsafe. What's the point of moving from a currency that a government can unilaterally control to a currency that the Ethereum board/stakers can unilaterally control?
The point of PoW is that it resists monopolization unlike PoS.
The centralized leadership has no hard power though; the community normally goes along with changes they propose because they're normally sensible. If they go rogue, people will stop following their proposals.
In Vitalik's words: "If someone puts a gun to my head and tells me to write a hard-fork patch, I will definitely write it. If I publish a patch to delete a bunch of accounts, how many people here would download and install the update and switch to that chain? I see relatively few raised hands. This is called decentralization"
PoW is trivial to control in its' today form. When the network hash power is dominated by three players, you know every address you need to pay a visit.
The point of PoW is that it resists monopolization unlike PoS.