I'm aware this has been already discussed 5 months ago but hear me out...
Master builders are trusted and experienced players who can be used for server building projects and events. They can't do their job the best way if they're forced to waste time either manually replacing custom blocks or begging an admin to do the job in their place.
This would also benefit OPs as they'll have more people to ask for help, and not only admins, if they need to copy or move stuff with a significant amount of NBT data.
I want to know how does the community feel about this.