Selfish request here.
I tried Em D Am6 Cadd9 which is a kind of stock alternative rock / indie rock jangly guitar progression. The variations thing suggested some really jazzy chords that didn't preserve the vibe.
Can you have a slider that lets me choose between that strategy and something more like THIS: https://www.youtube.com/watch?v=mU8HQ7O4nTc
i.e. using simple major and minor chords borrowed from "nearby" keys, so it ends up sounding more like a pop or rock song and less like jazz?
Because that's what I'm really interested in!