I think one of the issues is that it's hard for new or otherwise not-popular users to get much in the way of rewards, so the "selling point" of the platform often gets undermined by the actual experience of it. I think that more ways for people to get "guaranteed minimum engagement" rather than exclusively having to face an unforgiving popularity curve would be good -- Actifit is one thing that already does this: if you get your steps in you get an upvote, and are therefore less likely to end up frustrated by trying (and failing) to get noticed for your content on those posts. I think more Dapps or structures that work like that could improve the platform. It's probably hard to make that work though, especially with the "convergent linear" aspect of the current reward curve that squeezes rewards at the low end. (The big challenge with structures like this would likely be how to keep them from being exploited by spammers and scammers).