Searched for any similar threads to no avail (is there an advanced search?). Anyway, I just had a nice Pantheon game where we controlled every single flag on the map with 2000 points left to go. At that point we had to just wait and whistle while the points slowly counted upward.
Perhaps the point gain could be increased when all flags are being held? I imagine it was annoying for the other team who had obviously lost but still had to wait around, and we obviously couldn't kill the citadel.