i don't see web of trust being the future of nostr or any open social app. wot limits people's reach by default, leaving the biggest voices with maximum reach - this is called centralization - we don't want that.
AI content isn't always bad, some content can be good as long as we see it like any other kind of content, with critical thinking. there will be more bots than humans in the future, it's something we have to get used to.
that leaves us with spam and content filtering problems, both can be dealt with on relays and clients.