i'm guessing you dont fly...because of your answer to keep aircraft in the hold! it worries me slightly that you think controllers put aircraft in jeopardy for our "convenience".....i think not.
You have now been told by many, 126.825, that pilots have standard procedures to follow, and make no mistake, follow 'em they will, regardless of what you, or indeed any other air traffic controller, wants or desires.
Quite frankly, it really is that simple.
If additional holding or longer vectors with additional spacing on final is needed, you will not get any complaints from me, I carry plenty of extra fuel for the unexpected, perhaps quite unlike some others.
You, and the rest of the ATC folks will just have to learn to work a little harder, and in doing so I expect that you might find pilots just a bit more accomodating.
The type I fly is very flexible in the speed department, but some others clearly are not.
It's them you have to worry about...