Adding a "Random Community" button that just takes you to a random Community in any instance would be nice too. I used this a lot on Sync to discover smaller subreddits.
Also, the option to choose when/how posts are marked as "read". For example, it can be after you open the post, or interact with it in any way (upvote, preview...), or just scroll past it.
This is my No. 1 I'm looking forward to getting. I'm a scroller and it's so nice to be able to hide everything I've seen and get to a sea of new stuff.
The "read on scroll" is a close second but I don't mind interacting with stuff to mark it read.
Cool username by the way haha.
Another suggestion, I would love redditsync style "peeking" while in list mode. Holding down on the thumbnail temporarily opened the image, played the gif, or zoomed in on the article's thumbnail. It allowed for quick browsing without opening the thread or accidentally getting re-routed to an external site. It's probably the thing I miss most about Sync at the moment. Otherwise I'm loving this app overall so far.
NSFW content needs to be more blurred. The way it is now it's easy to tell what's hiding behind the blurring in Jerboa. NSFW content in Reddit wasn't all sexual. It was news stories or possibly triggering images in the mix. It's why I turned it on in Jerboa. But I may need to turn it off if the images are easy to decipher behind the masking. Going to All instances and New content shouldn't be nerve-wracking.
collapse whole comment threads (its extremly annoying having to scroll through all answers to a comment to get to the next comment especially when searching a comment you want to answer to in a 700 comment thread)
Given an option to show context in the "comment replies" tab in the messages section.
(When someone answers "you are wrong" to one of my comments I want to see my comment he replied to (and the other comments around it, so I can answer appropriately without doing 1.)
(3. Sometimes the post/comment function behaves weird, but I don't know if this is only on my device: when I change the cursor position, it sometimes keeps typing on the position where the cursor was bevor I dragged it somewhere else, and in the "next post" screen added pictures disappear, when I choose a community and I need to hit the "add picture" button again and add the picture again)