Jeff,
Thanks for starting this thread. Several new designs here in Atlanta incorporate CL bunkers and others that "challenge," and I've been wondering whether it's becoming a trend in our area. I hope so. I like the way it introduces, in some cases, what you call the "zig zag" nature of golden age design. You seem to mean that favorably, but then you write this:
"I would also ask the question of whether a course full of optional carry bunkers.. is any more interesting than one full of flanking bunkers? ... I imagine the shot demands and visuals of 18 holes with optional forced carries might have been as repetitive as any modern design in a different style!"
At first glance I wondered whether you might be contradicting yourself, but I suppose what you're saying is that while carry bunkers might be a good thing one shouldn't get carried away.
I'm of one with the Hanse remark noted by Mark Fine, and also with the suggestion of the occasional strip of rough in a landing zone. I'm surprised we don't see more of that. Don't like it, cut it.