When creating new variables that reference other variables, it’s incredibly difficult to determine which variable is the one I should be using. For example:

I have size/{1,2,3,4,5,6,7,8,9} variables that end up being used to set things like the width/height of buttons in form fields. When creating a field/accessory/size variable that references a size variable, there’s no way to determine which step in the scale is appropriate.

My suggestion is to provide the current value of a variable on the right-hand side of the list item in the variable dropdown: