So many good ideas already posted here !
The one thing I'd love to see is an in-house alternative to Discord, but ideally without it being the confusing mess that Discord has become. My pet hates over there are, in no particular order; it's centralised anti-privacy nature, the endless stream of notifications that look personal but are actually triggered by admins sending to all members, and the profusion of sub-boards without any way to mark them all as read in a single action.
In an ideal world, there would be a prominent & easy access button on every PeakD page (maybe next to Discover - Waves - Deck) for "Hivecord" or whatever we want to call it, and ideally enabled for other front ends to add.
Hive communities' addiction to Discord is a big issue for me, because it takes people off the site, but turned around the other way, having something slightly simpler but with anonymity and no need for KYC could be a big marketing tool for Hive.
RE: What should we build next on PeakD?