Right now, you must get a question right 4 times before you “master” it (25%, 50%, 75%, 100%)
It would be cool to have the option to customize this number higher or lower (e.g. 3, or 5, or 6, etc). I personally think 5 would be perfect for me.
Additionally, it would be cool to have additional, separate customization options for sentences that have previously been mastered. As some people have commented about in the Mark as Known thread, your memory for previously learned words is not that short, and thus you should be able to specify a different reappearance count and different time intervals between reappearances for mastered words.
I know this may mess with the points framework. But personally for me, optimizing my learning is much more important than earning points I wouldn’t care if you don’t get points for any additional reappearances if you set it beyond 4, or if you missed out on points if you set the number below 4.