Yes, but people not going to the party can still enter MK up until 7PM and everyone without a party ticket can stay until 8PM before being swept out so moving the parade an hour doesn't really seem like it would have that big an effect. Yes, party goers can start entering at 4PM on the party ticket so maybe its to clear out a little of that post-parade leaving traffic, but with the security changes it seems like there would be less concern of a backup of people waiting to get in at 4PM with people leaving after the parade is done with all the extra room by the entrance. It just seems like there has to be some other reason to make the change...