I think that thay are asking about going to WDW
after the cruise and wanting to know if they should do a pool day at the resort, or go to one of the parks. I haven't gone on
DCL yet but have seen many post about people being in the parks or MCO by 10:30am . So you wouldn't be in there for the rope drop, but still pretty early . Hopefuly some who have done the same as you want to will answer. We were trying to plan the same thing as you and figured we'd almost count on being off early, but not be too disapointed if we weren't.