I think the instances themselves don't feel much different (for example the UI for lemmy.world and lemmy.studio is like exactly the same), but I feel like maybe there needs to be some quality of life tools to help a new instance succeed with more ease.
Like it's hard to know that the instance exists, so it'd be nice if the UI makes signing up for one as easy as possible,
One big con at the moment too is it's actually kind of hard for me to find communities in a small instance. The large instances somehow people already added like all of them, so I can search for pretty much all of them. I think to encourage joining new instances, ideally should give the creator an easy way to like just add every single community across different aggregators. Maybe even a bot that just automatically does this so it doesn't have to be updated, or at least give the creator of that instance that option if they so choose
Give easy way to migrate account. For example today I just learned about a website with a list of the kbin servers, and thought maybe I should move from kbin.social to put less strain on it. However, I made my kbin.social account with my gmail, and I prefer to be lazy and just log in through gmail. I can't make a new account on say kbin.chat with that same gmail account actually, so I'd have to use another email account, and I didn't want to do that. Also in my 2 days on kbin, I made a community, and if I just abandon my kbin.social account, I don't know who would be the "mod" of that community now. There's already some data I'd like to not have to start over on