Tom,
Thanks for clarifying though you still seem to brand Clayton as your associate, whereas I thought I read on here that you were joining forces with his firm on Barnbougle Dunes? With him having his own company that would seem to be quite a different situation than being one of your associates.
Why is it again we all need to be "helpful" to Golf Magazine? Aren't they part of a multi-billion entertainment conglomerate? It seems rather odd that they can't Google or crack open The Architects of Golf.
Anyway...my suggestions, for what they're worth:
Cypress Point: MacKenzie/Hunter (1928)
Riviera: Thomas/W.P. Bell (1927) (the course opened officially June 24, 1927)
LACC North: Fowler/Thomas (1921), Thomas/Bell (1928)
Thomas was a new member at LACC in 1920 and since he was a Pine Valley guy, an architect himself and obviously knowledgable, he was asked to carry out Fowler's plans. I was lucky enough to see some of those plans Thomas had to work with and they are nice, but as you can imagine Thomas deviated slightly in places as construction got going. After Riviera was finished, he and Bell re-did the North Course, leaving many Fowler elements, taking out some that Thomas seemingly had mixed feelings about removing (the old #17), while totally revamping other aspects of the course to update the drainage, look of the bunkering, etc... So that's why I say Fowler should still have his name on it since some of the framework is his. While Bell brought his usual engineering and construction artistry to the redo, helping to give us the course that remains today (think about #11 and what a man-made feat that was!). And I suggest 1928 as the reopening of the North, but I'm not sure of the precise date.
As for the listings regarding the recent work at these facilities, it would depend on the policy of the magazine. Currently that policy is clearly...no additional credits for the Top 10 courses, add a member of the Jones family everywhere else you can. Just kidding!
Since no one really added new holes at Riviera or LACC, I'd say leave them off. Coore and Crenshaw would rather not be credited because those are the kind of gentlemen they are. I suspect John Harbottle would view it the same way (again, out of respect for Thomas). The Fazio group probably has the opposite point of view (after all, what's the point of doing this if you don't get some ink?). But of course, if you do credit Fazio, that's not accurate since he's made one stop and that was a visit on the way to a paying job.
Again though, I think we need to reconsider the point I brought up on my original post: if a magazine lists architects who only make significant changes, does that encourage renovation over restoration? I think so, which makes me lean toward not listing anyone but the original architects (the current Top 10 policy), and those who made key early revisions (Alison at Pine Valley in 1920-21, Egan at Pebble Beach in 1928, etc...). But is it a magazine's job to make such a distinction? I don't know.
Geoff