I think the rationale for Charles avoiding any Anglican type church was to not create a scandal and to not insert the Windsors into the problems of the Diocese of Pennsylvania. At least Charles went to church.
I guess the real question now is which way will ABC Rowan go? Is he a revisionist (personally he is) or an institutionalist (his actions as ABC have been)? If he holds firm with the tradition, he will still have a Communion but he may lose his own CofE.