Some thoughts from the maintenance side of things.
1) Most importantly, clubs need to hire supts who know something of G. Thomas' body of work, or whomever work their trying to replicate, imitate, or restore. I don't see an over abundance of supts. who study golden age architecture. The emphasis seems to be more on ways to get greens to roll 15 then on making bunkers look aged.
2) The jagged, haphazard look is more difficult, time consuming, and costly then the clean, soft look. First, the staff that is tasked with maintaining the rugged look needs to be educated and trained to exactly what that means; its a hell of a lot easier to mow the edges clean then it is to let the lips grow and evolve. It's also tricky to keep the edges looking rugged when your dealing with warm season grasses that have a tendency to try and take over the bunker. While they're great because they’re so strong and heat tolerant, bermuda or kikuya is tough to manage because of their aggressive growing habits. Maintaining that wild look with bermuda is a real challenge, because if you let it get thick, it will hold balls where they will be hard to find, and unplayable if they are found. This is not usually viewed as a positive by those who sign the checks.