"Users apparently dislike this workflow so much that they don’t bother contributing at all: significantly less people are editing Wikipedia than did a few years ago." To be fair, I think this exaggerates the role of the editing UI -- if the editing UI was that bad, then people wouldn't have contributed in the first place. The more common narrative for reduced participation is the growth of cultural issues which make…
Edit: more articles identifying interpersonal friction as the leading factor deterring would-be editors [3,4]. At this point I'm suspicious of the author's due diligence in studying the problem, making the proposed solution more dubious.
[1] Suh, Bongwon, et al. "The singularity is not near: slowing growth of Wikipedia." Proceedings of the 5th International Symposium on Wikis and Open Collaboration. ACM, 2009.
[2] Thom-Santelli, Jennifer, Dan R. Cosley, and Geri Gay. "What's mine is mine: territoriality in collaborative authoring." Proceedings of the SIGCHI Conference on Human Factors in Computing Systems. ACM, 2009.
[3] Kittur, Aniket, and Robert E. Kraut. "Harnessing the wisdom of crowds in wikipedia: quality through coordination." Proceedings of the 2008 ACM conference on Computer supported cooperative work. ACM, 2008.
[4] Halfaker, Aaron, Aniket Kittur, and John Riedl. "Don't bite the newbies: how reverts affect the quantity and quality of Wikipedia work." Proceedings of the 7th international symposium on wikis and open collaboration. ACM, 2011.