Currently, if you type the kunyomi reading in for a kanji when on’yomi is expected or vice versa, it will just shake the screen instead of marking it wrong. I think it would be nice if WK did that for cases where you mistype an ambigious reading sequence.
For example, I constantly miss the reading on 睡眠薬 because I always just type “suiminyaku” and forget to press an extra key between the n and y to prevent them from combining. 金曜日 is another big offender. I think it would be nice if WK just shook the screen instead of marking it wrong in cases like this.