Im looking at this from the practical side related to Hive. For all those other things you listed here, absolutely, but right now for Hive, I dont see it massively improving the experience especially due to complete lack of algos on any Hive frontends.
The Hive social media experience is heavily controlled by user choice and very few things, if anything is offered outside that.
Maybe this leads frontends to change that. If that happens I can see its value definitely.
Do I think the frontends will put in the effort. No i dont. But it could lead to something new and better.
Peer Verity is a protocol that is intended to not be Hive specific, so whether or not Hive websites are motivated to integrate it might depend heavily on how well it is adopted and marketed outside of Hive... Plus how simple it is to integrate. It's a system for networking between people - not every business saw the use of this when social networks themselves were invented, but they soon did.