'Deactivate Notes for selected pad' button for monophonic sequencer
If a clip contains notes that are both muted AND un-muted you can use the 'Deactivate Notes for selected pad' as a sort of A/B flip. As an example you could have two different kick patterns in the same clip, within the same note lane, and alternate between them with the 'Deactivate Notes for selected pad' button. The activated pattern would deactivate, and the deactivated notes would become active.
It would be a button you could press and hold. While pressing and holding this button, when you press a pad to select it all the active notes corresponding to that pad will become deactivated.
Also while holding down this Deactivate Notes button, any notes entered into the sequence will appear deactivated.