This is the typical terrain morphing that’s been going on for almost a year now, and it happens on all platforms. There can be only one topic per bug report so as to not split votes, so please make sure to participate in the existing thread instead.
The title does not refer to the World Updates themselves, but rather the patches that released them. With the USA World Update (patch 1.11.6.0) the LOD rings were tweaked (which means they are too close to each other, making the morphing more noticeable especially at closer distances), and the shape retention regressed (particularly the sawtooth pattern). As it is evident in the videos you posted, these issues are occurring even without the World Updates installed.
As noted above, this refers to the scenery culling and the pop-in that happens only when panning the camera. The usual terrain morphing has not been properly acknowledged by the team. They were asked about it in the May Q&A, where they said they’re investigating it and that it’s probably caused by data streaming and anti-aliasing, which is quite incorrect.