Compromise on popup trigger visibility

I'm looking for LVTF feedback on a proposed compromise to the trigger visibility condition.  Currently, the requirement is:

"Trigger: The popup does not obscure any essential content within the trigger."

Based on this argument in a GitHub comment<https://github.com/w3c/wcag21/issues/75#issuecomment-321078500>, I'm proposing we offer an either/or situation like:

"Trigger: Either the popup does not obscure any essential content within the trigger, or the popup may be closed via a standard keyboard method, such as escape."

What do you think?  Does that leave any accessibility hole?

Steve Repsher
Twitter<https://twitter.com/steverep> | LinkedIn<https://www.linkedin.com/in/steverepsherjr/> | GitHub<https://github.com/steverep>