I'll give you an example.
lets talk area attack, what is it? you press a and make attack your active command, left click drag and it will target visible units in the circle.
currently area attack is left click drag, right click drags does custom formations attack, this is horrible from a consistency endpoint right? perhaps confusing to new players. (see also how making bombers attack ground is somehow the most advanced rocket science skill in bar, because its so confusing)
wouldnt it make more sense for area attack maybe being a separate stateful command, lets say ctrl or alt a and left click drag for area attack? now left click drag on normal attack does "custom formations" attack. and for both right click (or even right click drag) exits
sure, if you have some experience making this is relatively trivial (although doing it properly is out of question for a crushing majority of people that ever contributed to BAR)