Thank you for your report. The morphing is a universal issue and was greatly exaggerated with the World Updates noted in the thread’s title, however…
That’s a different thing, and it’s related to the scenery culling that was introduced with Sim Update 5. It was released on 27th July, so it probably coincided with your GPU upgrade.
The DACH World Update, which will be released next week, will introduce a slider to allow you to reduce or disable the culling. But still, it would be recommended to look into and upvote the following topics when it comes to the culling because it’s a separate issue from the morphing.