Well, I’m not a traditional Anglican in GKC’s sense, but in my understanding of historic Catholic polity, the whole paraphernalia of archbishops and metropolitans and so on is peripheral and of dubious continuing value. It developed in the ancient world as a helpful way of structuring the Church. But the basic, divinely given polity of the Catholic Church has always been bishops in communion each other and in particular with the See of Rome. Anglicans obviously lack communion with Rome, though I’m not alone among Anglicans in regarding that as a defect to be overcome rather than as a freedom to be vaunted. Because the Episcopal Church came into existence in a society that lacked the traditional structures of European Christendom, it was able to reproduce the “basic” structure of bishops in communion with each other, and like many Episcopalians I regard that as a good thing. If I were in the C of E, I wouldn’t try to abolish the structures of archbishop, etc., because they’re part of how things developed there.
That being said, I actually have a problem with the “Presiding bishop” idea in the first place–it makes no sense to have a “bishop” without a see and with no responsibilities except for presiding over the other bishops. So in a sense my problem with the current PB is the opposite of the way GKC put it. It’s not that she is trying to turn herself into an archbishop, but that she’s taking an office that shouldn’t exist in the first place and give it real teeth. It would be much better if we had a system more like the “traditional” one, in which a particular bishop (New York, say, or D.C.) had a primacy of honor but no real authority over other bishops.
So I suppose I do want a “traditional Anglican” polity, in the sense that I want such primacy as exists to be based on particular sees rather than on an office whose sole function is to be the “boss bishop.” I don’t think that KJS is moving toward a traditional Anglican polity at all in strengthening the “boss bishop” office, but she is giving that office some of the problematic elements that metropolitan sees have had in the past, creating the worst of possible polities (well, the very worst might be that of the UMC

).
The basic problem ,though, is the lack of communion with Rome. In the context of such communion, regional synods of bishops, metropolitan sees, etc., make sense, because they speak for the Church as a whole, reining in potential “rogue bishops” with Rome as the final arbiter. Without Rome (but assuming the validity of our Orders, which is of course a separate, difficult question

), all we have is a collection of bishops. And the less we pretend otherwise, the better.
Edwin