currently you have the option to show furigana for unknown words which I like and use but I find it sometimes makes learning new words harder since without the furigana, the kanji adds an extra level of complexity. i think an option for furigana to be shown for low accuracy words regardless if the kanji is known or not; kinda similar to how you can alter the difficulty of drawing kanji questions by level.
This would be an excellent addition, but not something I can do anytime soon. I would like to expand this discussion, though.
The main issue that needs to be discussed is that words with/without furigana can appear in a LOT of places (lists, questions, sentence, etc.) so the setting would have to be complex enough to handle specification across these different areas.
