The award for the most absurd "UI improvement" must go to the Skype iPhone app that was painstakingly rewritten so that it felt like a Windows Phone app, complete with gestures that didn't make sense to iOS users: https://www.neowin.net/news/skype-for-ios-completely-redesig...
It was actually technically impressive, just...why??
It's a funny kind of myopia that causes companies to generate 'consistency' in ways that only make sense internally rather from customers' perspectives. 100% of Skype on IOS users interact with other IOS apps, vs some considerably smaller amount use Skype on Windows Phone or even Windows Desktop. When the conventions disagree the choice should be obvious...
It was actually technically impressive, just...why??