Great story about a creature making a comeback with the help of some hard-working humans. But, in my opinion, the best place for an oyster is in the ocean, not anywhere near my mouth.
(I don't like eating them personally, that said, but that's a taste thing.)
I'm sure farming them en-masse probably isn't great for the local ecosystem but it sounds like there's a long way to go before historical concentrations are reached let alone surpassed.
It's probably fine to restore the oyster reefs to their former glory. It might not be fine to populate them with 10x the natural amount.