No scripts here, mostly because I use Safari on Mac and the small friction to switch browsers exceeds my desire to do it.
I have popped open the console window and done some one-off stat dumping, which I like. Data nerds, unite! If I were going to install scripts, they would all be stat-related like exact SRS level display, accuracy by SRS level, future workload graph, failed item next review, etc.
The thing I find myself missing in the standard interface the most is: (1) I look at the kanji/progress or vocab/progress page. (2) see some pink ones from prior levels. (3) Wonder when those are due to review again. To find that out, it’s possible, but tedious if there are several. I want a sortable list.
Next highest wish is ‘critical path’: which items can I not fail without pushing the level-up time. That’s just a curiosity thing, though. At first, it’s obvious: I can’t fail any radicals, and it doesn’t matter if I fail kanji. Until, the radicals are guru. After that point I can only fail 10% of the kanji on that level. It would be kind of interesting to make a countdown, I can fail 3 kanji without slowing down my promotion. Now 2. Now I can’t fail any more!
Anyway, not specifically those, maybe, but data-report-related ones I might like. Messing with the SRS, interface, or learning plan/order - not interested.