Just fricking lay off some developers.
It's obvious these changes occur because you over-hired and now a bunch of go-getters are afraid to be seen sitting around NOT BREAKING SOMETHING THAT DIDN'T NEED FIXING!!!!!!!
Yahoo loses market share year after year after year for a reason. The fact that you haven't figured out something as basic as not changing something that nobody in your user base was complaining about is the clearest reason as to why this has happened. If it weren't for Ali Baba the idiocy of Marissa Mayer would've already driven this company into bankruptcy. Please just fire her. This is not a "diversity" issue. She is an incompetent CEO, regardless of how photogenic she is or how inspirational she supposedly is to the under-represented demographic group that is females in tech. Just get rid of incompetence before she destroys all of your brand equity!!!!!!!!!!!