You may like Epcot/WS better.
We were there last NYE and all around WS and leading into were different bands.
I have been in MK for NYE and don't recall any bands on stage. Just marching bands going through the streets during the day.
best spot to be in in the mk view room at the com resort partyin on new years eve with the ball drop on abc i been there in times square the last 3 yrs and ready for something new