At BLT the south facing rooms see the EPCOT and DHS (including Fantasmic) fireworks even some of the west facing can see those fireworks. They are way into the distance though. BLT normally sees the fireworks only at MK although it is a sideways view.
When were were OKW on Turtle Pond Road we could here the fireworks from our room and balcony but couldn't see anything. And at Kidani Village we could hear the fireworks at DHS and Epcot and could see them over the top of Jambo House, but only the highest fireworks, it wasn't much of a show.
I would say some of BWV, BLT, VGF, and PVB probably see the fireworks the best. All the others are just limited views.