I definitely agree this would be extremely helpful. I'm at that stage where inverse mapped sections are common in what I play, but i can't play them nearly as well as the other kinds of patterns. This would help me practice a lot.
Just like the official LN chart from the official O2Jam song ; Phase 1 by _spam charter.Electro Fantasy HD was the first song to feature LN patterns, though very simple at most. complicated LN's started to appear on End of Fight. just some additional info
Example video :
I'd like to bump this because I still think this is definitely worth considering adding.