The other worrying thing about this is that without privacy MEV searchers will prefer sending their transactions to large pools who are less likely to frontrun them. That could give large pools more revenue than smaller pools and drive more centralization.
1/ ETH2 pos launched on 2020-12-01. After 6 months, Top5 ETH2 staking pools have 33.94% share now. In addition, Coinbase will launch its staking pool soon. Do you think it will have a smaller share than Kraken? How about six years later?