Well lets just take a look...
View attachment 543019
I tried to break it down by circles.
Red will clearly be Dinner Packages/Fastpass/Reserved/Pay-Per-View areas.
Blue seems to be the best areas that will be first come first serve, still trees in these areas might obscure some stuff.
Orange might still give you a partial view of the Stargate's screen but will be covered by trees/structures/Water Tacos.
Yellow will still give you a good view but the Japanese Archway will be front and center in the middle of the Stargate.
Green will be generally a bad view/incomplete since you will not be able to see the Stargate screen.
Pink are the 3 waterfront restaurants and the Illuminations dessert party/fastpass viewing area. These now seem to be bad/generally poor viewing areas as none of them face the Stargate's screen and half of them look right into the exposed side of a Water Taco.
Overall it seems that the prime viewing angles of the arguably largest nighttime show viewing area has been reduced down to less than 40% of the entire lagoon.