I think you forgot adding real time signature other than 2/4, 3/4, and 4/4. Adding real 6/8, 12/8, 5/4, etc would be a great help.

Also adding more that 4 chords per measure would help as well as adding chords on the 1/8th or 16th time/note would be a big improvement IMHO. YMMV


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