Give it a few weeks. It was the same on Mastodon during heights of the #TwitterMigration. Everyone was talking about how they left the ship, what's different about the new place, and keep talking about the sinking ship.
After a while the new place felt familiar and that talk got less, and those meta-conversations were replaced with conversations about other things. If we get to that on Kbin eventually, that'd be great.
At least they don't donate their time and effort to Reddit anymore.