Thanks all for input, but I think a point is being missed.
I work with Sheets from early in a project as many layers & classes can get built up on complex jobs. I know about editing and saving sheets, but as PR says it's a pain to keep going back and saving and editing them every time a new class is made, which can happen a lot (PS thanks for Resource browser tip).
As the majority of the time when I create a new class I want it to be visible (or is it just me?), couldn't the default be switched from IN-visible to Visible, or even better have the option to choose.
Does this make sense