This is exactly what we did this past NYE. Mk for their pre NYE fireworks with dinner at Crystal Palace. Then Epcot for NYE~~had breakfast at the Garden Grill and dinner for 8pm at the Biergarten. Worked out perfectly even got a FP+ for FEA LOL.
This was the 2nd time we did Epcot for NYE and it's always so much fun and festive.
Just be forewarned that it took us 3 yes three hours to get out of the parking lot in the preferred section too. Never again!
The year before my DD and i walked to the boardwalk and got a taxi back to our hotel. But this time my DH said we'll just park in the lot


Thankfully they left the bathrooms open
Sorry to get off topic but yes definitely Epcot for NYE.