Consider this low priority, but just something that I think could be helpful and may be easy to implement (hopefully!).
When you press F4 in debug mode, you get a list of all the variables used in the program so that you can select variables to watch. Since a list of all variables is already being gathered to be displayed here, it would be excellent if this list could be copied to the clipboard or to a file.
Maybe another option on that same F4 screen to copy the information displayed to a file or to the clipboard could be implemented.
I just think that it would be helpful to be able to save this list to aid in managing, cleaning up, organizing, etc. I have a program that currently shows 242 variables available when I press F4. I know that this doesn't include arrays (and I have a good number of those as well), but it would still be extremely useful.