For historians, the retrospective legitimation of essentially every criminal act Nixon committed while in office is quite mind-boggling. Ford’s pardon was utterly unnecessary.
Does this ruling affect lackeys and henchmen? If the President orders you to go kill John Roberts is the guy who pulls the trigger still a criminal if the president isn’t?
Sure. But he can pardon you.
Who knows, maybe he can pardon you for crimes you haven't even committed yet. Or give a blanket pardon in advance for anyone who kills any SCOTUS justice appointed by a Republican.