WL/VWL, GF, AKL - are on the must see list
nice - BC/YC/BCV, BWV, PO, Cont, PC
okay - Polyn, OKW, CSR, As, CBR
my opinions!!!
yes, the resorts should still be decorate but don't wait go see the resorts. go immediately by Jan 5 alot of it will be gone.
I would pick the beach in front of the Polyn for MK fireworks.
for Epcot fireworks close to the pavillon at seabreeze point - there is a high point around here that you can see the higher ones.
Studios - don't know - maybe along the walking path to Studios.
if you are staying at BWV - you might get lucky and get a room with a view to the fireworks. now you won't see them all - but definitely some.