A lot of people like to park hop to Epcot for that reason, Epcot is usually open til 8 or 9 depending on the day, which can make it worth it, but if Epcot is closing at 7 every day of your trip, it's definitely not worth it. However, 7 has just been the default closing time, usually closer to the date, they extend closing to 8 during the week and sometimes 9 or 10 on the weekend if it's going to be a busy weekend.