Now that the stack is clickable and viewable, having different shades of a certain color may not be recognizable to a user and for a user simply using the stacks for note taking (i.e. they added an Activity of Notes, dang that can be default actually (just thought of that now)), so to rid this issue maybe the stack has different decorative things like lines, or dots, different little schemas, it could just have a number on it like the current version has, but that is ugly and isn't elegant enough
This is simply a feature.
Now that the stack is clickable and viewable, having different shades of a certain color may not be recognizable to a user and for a user simply using the stacks for note taking (i.e. they added an Activity of Notes, dang that can be default actually (just thought of that now)), so to rid this issue maybe the stack has different decorative things like lines, or dots, different little schemas, it could just have a number on it like the current version has, but that is ugly and isn't elegant enough