One of my favourite features of the ER-101 to create rhythmic variations is moving the boundary between adjacent steps (hold DURATION button, change DURATION value). It would be awesome if there would be a MATH operation for that (MOVE/SHIFT?) – affecting the selected and the following step.
This way it would be way more playable, especially when using the Group Transforms of the ER-102. I know that I can achieve the same result with two combined Groups and Rotate, but this is not very intuitive and takes a lot of time when I want to change the selected steps of the Group(s). With a MOVE/SHIFT DURATION Math operation you could just select an Euclidean mask and apply the rhythmic variation to these steps.