Use color in the debugger as it is seen in the editor.
We often spend enough time viewing our code in color that when we get to the debugger, the plain black and white makes it harder to recognize certain parts of your code.
As screens are now mostly wide, it would be great to change the Script Debugger window to vertical split.
Rigth: debugg info
Also when You open a large object, eg: notesDocument, then it's hard to review it, because You need to scroll.