Agreed on all points. I want the ability to “save” sets to the side and rename them. As to the ease of use of the buttons. I agree that it’s difficult to determine what they do. Perhaps a downward arrow on each of the thee push buttons and an up arrow on the pop button (I tried to do that with ASCII ^ (pop) and v (push – and the dashes in “-v-” indicates coming from both Layers and Renders and pushing onto the stack)?
Also the tool tips (which you don’t get from the picture, but you do get when you hover over each button) are:
“Pop stack and assign visible layers and/or renders”
“Push visible Layers onto stack”
“Push visible Layers and Renders onto stack”
“Push visible Renders onto stack”
Hovering over the button shows every visible layer in that set.