So now instead of waiting for one group to spend 3 hours killing the NM, we have to wait 3 hours for the top HNM on the server to finish farming in order to attempt our clear runs.
The best get better, the rest of us have to stand around and wait. Except it's worse than before, because the best had to stand around and wait before while the "moderately okay" completed content they could otherwise hog.
Just go ahead and do what you did in Abyssea and add three ???s already. It's the only solution that's going to make everyone happy.