I am trying to lower my use of Reddit and increase my use of Lemmy.
One thing I would really like to be accepted (since its already in the proposals on Github) is to have multiple communities that have same topic somehow be joined and their news aggregated together.
This is one of two feature I really want in Lemmy. The other is the ability to migrate accounts (and, potentially, communities) between instances seamlessly like you can with Mastodon.