So the Riviera set-up is getting clearer. It is interesting that West branch of the resort is at a different angle from the center and East branch, but when you look at it relative to Epcot, it's pretty clear that the two sides of that wing are angled to get a view of the Epcot fireworks show. (I marked this is crimson below.) If you look at the point of the angle it aims directly at the center of the lake. This is certainly not a coincidence to give all balconies on this branch a view of Illuminations. It also shows that only the furthest wing may also have a view of DHS fireworks, so they are unlikely to be using that as a selling point for these rooms. This is about 2/5ths of the resort (40%) but seeing as only the upper floors are likely to give decent enough views to sell the rooms as "theme park" view - we are likely looking at about 15-20% of the resort as "theme park" view - which is pretty typical for Disney to do with their DVC resorts (BLT is 20% theme park, Boardwalk is around 15% "Boardwalk" view, Poly is like 17% "Lake view". It also uses that "V" to block the view of the rest of the resort from Epcot. so it won't be quite so intrusive.