Hi Pine. The other things that you're almost certainly already aware of are ERI (in current Beta Features), and the save/publish button change currently scheduled for early May. Beyond that, there are the usual ongoing incremental standardizations to the OOUI system, but that will mostly just be minor colour changes, and not location changes/rearrangements or anything overly confusing. However, as will always be the case, someone might have an epiphany for an improvement in any aspect of the site, and so I can't predict the future with certainty.
Are your in-progress scripts available anywhere, so that I can look through them? [searches... searches...] Ah, m:Grants:IEG/Motivational and educational video to introduce Wikimedia/Scripts (always include links!). From a quick skim through that, nothing leaps out at me as an area that the UI might change. I'll try to take a closer look when I have time (likely a couple of weeks). Feel free to remind me then.