Okay, my take:
The first five holes are decidedly unmemorable, but nevertheless quite tricky. I remember that for the Open in 1982, when it was hard as a rock and these holes were playing downwind, none of the pros could do much with them -- many were driving it within 50 yards of each of the first three greens, yet were totally unable to get their second shots close to the hole from there. I'm not saying these holes are great architecture, but they hold up well.
I've already said I think 6-7-8 are excellent holes, and nobody disagrees much there.
I'm surprised so many people keep talking about the stretch from 6 through 12, because I really think the loop at the far end is overrated. Yes, these holes do play crosswind, and you have to deal with that -- that's really why the course feels like a 3-act play, because it goes downwind, crosswind, and then into the wind. But I think 10 and 11 are just hard more than interesting. Can anybody tell me where you should try to go on #11, other than staying out of the gorse and hitting it as far as you can?
The other thing that bothered me about the "6 to 12" story is that it ends before 13 and 15, which are two of the best holes on the course to me. Both of them have extremely rugged fairways, and you either have to place the drive with precision or deal with a strange stance for a very long second shot. Because there aren't many fairway bunkers (none on 13 at all) I suspect people can't get a clear picture of these holes in mind, and they tend to dismiss them ... but I think they are the essence of links golf.
Sixteen is quite interesting because of where the burn crosses it, and seventeen is a terrific long-iron par-3.
In short, while I think all championship courses are somewhat overrated, I think Royal Troon is made to suffer for all their sins. It doesn't have the kind of holes anyone would describe as "cool architecture", so it gets no love; but it does present a lot of cool golf.