I haven't watched from the BB viewing area exactly, but the view from the F! viewing area is fine. You'll be able to see the sky bursts, but none of the effects on the castle. It's rather like watching the show from IaSW Mall (but without the projections on the buildings). I have read that they will be using the F! mist screens for the image projections for
Disneyland Forever. So if anything, the view should be better for Disneyland Forever than it has been in the past.