for florida residents, they sell an epcot after 4 ticket annual pass. It's likle 150 bucks, but it doesn't give you free parking. I think the original purpose was to entice locals to dine at epcot.
they now sell a weekday annual pass for florida residents, again much cheaper than the other annual passes, but fewer perks.
Other than that, no. There's no discount for entering an hour prior to park close.
If you're arriving late in the afternoon for your vacation, it's only a few dollars more to add a day to your ticket, unless you have more options added. Then it might get pricey. But there's plenty of options like watching wishes from the poly or contemp to get you excited for your first day in the park.