Is there some change you're particularly concerned about wrt to setup complexity? Lots of the changes might simplify setup because they build in functionality that previously required plugins. The LSP improvements mainly apply at the interface between LSP server and editor, not stuff that users would set up themselves. A bunch more changes are either behind-the-scenes performance improvements, or are directed at plugin authors. There are new features added. But I don't see anything that makes set up more complicated.