I don't know if I understand it correctly (i don't have experience with the feature that you suggest).
Is it like a controller is able to tell "loop now this pattern"? , is it a "start playing song now, but start from here"?
When the controller does so, how is it attained? is it just the click of a predefined button? Is it like setting a program number and then sending the action?
There is quite a lot to be improved from the MIDI side, but i don't know how much is feasible right now
<[JAZ]> Pa pi pa pa pa pi pa.... ;ĚD