I hope the old ui customisations will be available, would be great.
I'm also wondering what will be done about lemmy's wierdness about subscribing to subs, where you need to search up the sub on your instance etc.
Even sharing the comment discussions is useless if the recipient isn't already from the instance (probably are but many won't be obvs), the site won't let them comment unless they find the discussion mirrors on their own instance. So how will sync for lemmy deal with these eccentricities (that lemmy devs are also obvs going to deal with in the future)??
One cool thing I've discovered is that at least inside apps, those links with !!!exclamation marks to other subreddits work within the app and within your instance. So that's cool. Not sure if it works with comments, since they're a different structure.