".... quite likely....." is actually quite wrong.
serenitygr nailed it. A simple look at the map is proof.
Here is a picture of the Fort beach area on the lower right and the MK area at upper left. I circled the bungalow beach area in yellow. There are two red lines: one near the Boat Rental building and stretched to the Castle in MK (the lower fireworks come from inside the park). Then the red line further from the dock stretched into the environment which is where the high fireworks (majority of them and the really good ones) which is well behind the MK public areas. Thus anywhere between the red lines is line of sight from the new FW beach towards the MK fireworks. The yellow circle would have to be between the red lines to obstruct the view.
View attachment 419243
What has me excited is that the upper/right most red line clears Discovery Island so it will no longer be a visual roadblock to the launch of the big stuff. Visually, the new beach might be an improvement for the fireworks. And if they pump in the music to the new location, so much the better.
Bama Ed