In order to use LLN as a tool for Drilling techniques like shadowing and chorusing
I suggest something a bit more flexible than Anki flaschcard in LLN tools
a) The ability to create a-b sequences by combining subtitles. You check in checkboxes which ones are to be played and then put them in prefered order as in media playlist.
b) Turn on and off subtitles and transliteration (Pinyin) before playback.
This is in line with LLN core functionality and will increase the value for loyal users.