That's a bit generous for the past and for the other parks.
In the MK, there are many places, while in one land, you can see into or see the buildings of another land. Especially if you do things like get up high on the log flume or the tree house.
In DHS, sight lines are meaningless (and a joke) when you paint all the boxes pink and call them studios. Not to mention seeing backstage from ToT.
In DAK, the big box for Pandora is a huge eyesore when you're driving in. But no one seems to remember that when they post pictures of GotG's big box from the Epcot parking lot.
And has been mentioned many, many times in this thread... as much as FW was built 'to be seen' with all its pretty architecture...
1. You're still seeing a bunch of buildings outside of WS which are not at all related to national pavilions and the WS.
2. Test Track's "pretty building" is just a big ol' silver cylinder. It's hideous (IMO). From WS it looks no different than a big silver box.
3. The horse is out of the barn: the big ol' tent between UK and Canada and the Soarin' show building have 'ruined' the sightlines of Epcot long ago.
Also, let's not forget that it's relatively easy to make all the sight lines pretty when you first build a new park and are taking that into account. Not so easy when you're a victim of your own success and have to put in new, giant show buildings... where do they go? The MK has that issue with TRON Cycle now.