Amazing - you've got my money! and a feature request to maybe add variations to each of the chords (inversions, arps, etc) when you edit them, and maybe a player/looper to preview the sketched ideas!
You are already able to input inversions, using the Slash Chords feature. Once the sound engine is implemented, being able to hear the specified inversion will come for free.
Thanks for the suggestions, I'll keep them in mind!