[mrodock]

Should I address, or "imapct fix" with a distinctly open clubface?

If you rotate the face of the club as fast as Hogan did around impact, then yes, otherwise, no need. Hogan built several face/slice type moves into his swing and game, the open clubs is just another weapon he had in his arsenal for kicking that hook. If you hit a hook no matter what, copy all his slice producing moves, if not, keep adding at your own risk. Of course all of these "slice-producing moves" worked so darn well because Hogan had some hooking tendencies, flat swing, quick clubface rotation, quick tempo, etc.