We park hop regardless but absolutely are making our evening hop to Epcot or the MK on the days they have extended hours. As far as I knew, the monorail from Epcot to the MK is back. They did have busses in the afternoon, but not sure they do now that the monorail is back. Regardless, to me the monorail is much better.
loves to dive is correct - no bus between Epcot and MK. So your options are monorail with transfer at TTC (what we'd do if we were in former Future World when we wanted to leave) or walk to BC or BW and catch the bus there (what we'd do if we were in World Showcase).