I would find it interesting to be able to activate or not each channel on each step. When you activate a channel on a step, it is automatically applied to all the steps in a program. Being able to activate/deactivate on the step of our choice this function would allow us, for example, to create chasers of another color over a background activated by another program.
I used this possibility a lot on Martin LJ a few years ago and it was very practical.
Best regards