1:
Being able to personalise the Dashboard in some way would be nice. Seeing as all the data is already split in different blocks/“widgets” both on the Dashboard and in the stats page, I think it would be neat to be able to choose what to display. For example we could display the heatmaps, the troubled grammar/vocab and recent mistakes or such (the latter being in particular an idea I get thanks to Wanikani’s own front page displaying those info)
Think Steam’s profile personalisation (best example I have in mind lol), where you can choose different blocks (Favourite game, achievement showcase, screenshot showcase, etc) and order them however you want to display them.
It might make the Dashboard a bit of a scroll depending on how much data one decides to display on there, but it’d avoid having to navigate to a completely different page and have all the data one wants available right on the dashboard.
2:
This is less of a request and more of a nitpick, but when mass importing Guru Vocab from Wanikani, if vocab does not have the Reading/Reveal & Grade combination available (my default review type) it defaults to Translate/Manual instead of Translate/Reveal & Grade, which means I have to change these manually when they come up in the first review after import.