Give user's a choice!
Allow users to change appearances if they like or not. The new look and performance of the app really, really, really, has no natural touch, more AI driven, feel, and no user consideration at all in it. It's just a drum beat away from users walking away to another mail domain! Your change in functionality and appearance hurts your Brand. You all didn't consider the users at all, you just changed everything all willy nilly, and just threw everything classic to the wolves!!! The world is already on a moral declinationabe spiral cycle, and you add to it with this crappie look and experience of misuse!
COME ON YAHOO, CHANGE IT BACK, OR GIVE USERS A CHANCE TO DECIDE SINGULARLY!!!!