I definitely think an easy skip shortcut is what needed here. Deliberately typing an item wrong is what I’ve been doing myself but it’s a workaround and can actually backfire on a few items that have あ reading.
And checking okurigana is a good feature. It’s really annoying when I know the kanji part and mistype the okurigana in a rush.
I probably would have used a different logic personally though: if kanji reading is correct - check okurigana and warn, if kanji reading is incorrect - fail item.