As someone who runs a community, the ability to disable downvotes and have more customization within that Community would help a great deal.

I also wouldn't mind the ability to post something like a Delta on a comment to show a changed view or something.

Being able to upvote without getting an error and having to reload the page, gets really annoying really fast

For people to stop using downvoting as a method of disagreeing and only for content that is not appropriate.

“Suggest edits” that Quora had. Suggesting edits allowed the crowd to make all sorts of improvements to answers.

Turn off Downvote. Lemmy have some quirky user where they will lurk all the time and downvote content that doesn't fit their own preference. Like, what are your purpose? If you don't like seeing that language why not turn it off? Why not scroll past the topic you don't like or don't matter to you? It chase away a lot of people because they feels unwelcome.

These quirks is also the reason it's hard to recommend lemmy to my acquaintance and friends.