I agree, Maryland will only change their rules for issuing permits on a regular basis kicking and screaming. If they are forced to start being a little more reasonable with permits, they will read the court order very narrowly. Since it is a resident suing, the decision probably will deal with only residents though the opinion will probably not mention non-residents. Since some states will only issue permits to residents, Maryland will probably go the same way, and not become the welcoming state that people hope it will become.
Of course if Frederick County got their wish to allow local sheriffs issue permits instead of the MDSP, I think you would find a lot more permits issues in Western Maryland, and the Eastern Shore. Might not help with the non-resident permit issue though.