The workaround you propose is very limited. It means I have to know before I start a project what inputs are required. Once i am in the process i am stuck with the initial input settings. For me the requirements vari from the different stages of a project. Initially I need only a few inputs for scratch tracks etc. then i want to overdub let’s say ac.git. Then later there might be drum kit Rec, followed by voc etc. every time i need different input configurations.