Mark
From what I can see of Colt's courses in the UK, he rarely got it wrong. Indeed, I can't think of a single instance where I thought something really messed up was going on. Now, one could make the argument that as a body of work, perhaps Colt relied too heavily on certain elements such as severely raised greens or the one that sort of bugs me, framed greens where the corners are raised. I suspect some of this may come from using the same builder quite often.
For Dr Mac, I think we have to question his bunker style. It isn't a dead certainty that there were maintenance problems or that individual clubs didn't call for these "flowery" bunkers, but I am suspicious that Dr Mac didn't totally think out the consequences of his preferred styling of bunkers. So many courses altered the style that one has to at least second guess what went on. Mind you, in all truth, Dr Mac could have been a victim of circumstances. That said, when money was tighter late in his career, Dr Mac did tone down his bunker style and quantity.
Ciao