Has a bit of a leg up in that if it's only academics commenting, it would probably be way more usable than typical social media, maybe even outright good.
Calling it peer review suggests gatekeeping. I suggest no gatekeepind just let any academic post a review, and maybe upvote/downvote and let crowdsourcing handle the rest.
While I appreciate no gatekeeping, the other side of the coin is gatekeeping via bots (vote manipulation).
Something like rotten tomatoes could be useful. Have a list of "verified" users (critic score) in a separate voting column as anon users (audience score).
This will often serve useful in highly controversial situations to parse common narratives.
Yes publishing is broken, but academics are the last people to jump onto platforms...they never left email. If you want to change the publishing game, turn publishing into email.