Maybe just a test but the last few days MK did not "drop the rope" at opening. They carried the rope down MS all the way through the castle. This is to stop the mad rush to the Frozen M & G. You may have thought you had seen a mad rush previously but I am told cast at MK have seen nothing like the madness of the Frozen run. Have not seen it myself as I avoid the parks during busy times, so this is second hand from a MK mgr but a long known and trusted source and neighbor. She tells me a cadre of cast including supervisors, managers and security carry a long rope from each breezeway and join together to stretch across main street stopping all guests from running. They can not escape the rope barrier until the end of Main Street. Then only to go left or right to other lands. But the only way to Fantasyland is behind the rope through the castle. Guests were stopped from running through the shops, passing the rope line around by City Hall or TST. They were also blocked from cutting through Town Square. The entire entourage proceeded at normal slow walking speed. Sounds like a reasonable solution for safety until the popularity of the M & G subsides.
