Not an essential feature, but rather a nice gimmick would be to display the tuning curve directly inside the tuning view. Maybe as an option (toggle on/off) between the keyboard and the scale just like the partials.
I find it quite pleasing to see the black dots align along the tuning curve. It would also be nice to keep the black dots from the measurement and maybe introduce a new green dot for where I left each note. That would be like a before/after view of the tuning. Maybe to show to the customer.
I made a simple little mock-up but don’t manage to add a picture here from my phone.
