First of all, it appears unfortunate that - apparently - there was no (prominent) public announcement of this test on dewiki. How is the email response team (OTRS) supposed to respond to questions about a feature it doesn't even know is enabled? I hope we haven't missed some announcement, but those of us who discussed the matter have not noticed anything like that.
Second, I'm relaying the user's feedback to you: "I find the newly introduced PopUps extremely annoying, because they pop up at the slightest touch while scrolling through the article and cover the text I actually want to read. I prefer the previous behavior, where I click on blue links only if I want to read the corresponding articles."