I think the toughest issue is that everyone who cares enough to pay more can just as easily just play in the early AM, and get a quick round anyway.
Any course that’s got a full sheet has to balance customer experience with increased revenue, but that is a tough calculation to make.
My argument has always been that the best way to deal with the issue of slow downs is to treat it like Disney does. Make the areas that back up entertaining, but only after they start to back up (this can be monitored or at a specific time, like 10am). Have bathrooms (2 mins), and a halfway house (15 minutes), even a bar purpose built for waits with a putting green or a view of another green. This can turn a half hour wait from something intolerable, into a tolerable way to have lunch on the course.
Courses with a full sheet have little economic incentive to increase pace (since we’re already paying for the slow round), but they do have an incentive to offer goods and services while we are a captive audience. It’s not perfect, but it’s better than nothing.