I don't know if you can see well from any of the 60's, but someone may be able to answer that better--we have been in the 50's twice, and if we go there again we will get a preferred room in the 60's as our location was bad this past week.
We couldn't see anything from our room, but walked to the back side of 50's (building C I think) to see fireworks, but in my opinion most of the fireworks are on the lake at Epcot and can't be seen anyway.