John,
While you may be right in the special case of the Old Course, I know that most of the courses I have ever worked on, eventually, the maintenance nuisance, headache, time waster, or whatever you want to call it, eventually gets removed by those in charge of it every day.
The justification is usually cost savings, either by not buying a special mower or hand mower, etc. I don't know the budgets of the Old Course, and presume they clean up on the Open every seven years, so it might not be a real issue there financially, as well as historically. I also don't know if the crowds of the Open crawling over those things has anything do with it, either for safety, wear, or whatever.
But, I would bet it wasn't hastily considered.
If those who oppose changes tell us to not say others are "attacking" them for being against all changes, I would submit that the Anti change faction stop "attacking" Dawson and Hawtree as incompetent or uncaring, even if you disagree with their decisions in part or whole. If you only want the course to be restored to pre Dawson changes, then you accept all the changes that went before in similar vein, but now its different?
I think time will heal all wounds for most of these (although the 4th hole is the one I question the most, and apparently Dawson does, too, and may reconsider before implementing next year). I think all it will take is a birdie putt from Rory on the 11th or a chip in by Tiger on 2 and those will be hailed as the greatest changes to the Old Course of all time......at least for most of the golfing public.