In addition to "accept", "reject" and "improve", I'd like to be able to "ignore" a suggested edit. I would use this when I don't feel I understand the content well enough to do any of the existing options.
This would allow me to clear out everything from the list, so the little counter in the page header would be more useful. Right now I'm not sure if "5" is the same 5 suggested edits that I didn't want to take any action on, or if they are new.