The last time an Apple operating system went through a redesig, iOS for that matter (iOS 6 -> iOS 7), it didn’t go well. We still pay the price of this today.

“The Verifier also outlines some of the features coming to watchOS 7, many of which we’ve heard before. watchOS 7 will allegedly include a “fresh design,” updates to built-in apps, and improvements to Siri, with little other information included.” - MacRumors