[Dislike]:Search disappeared (actually moved around)
Moving the Search bar into the Title area was not a great idea. In fact as previously it sat on top of the emails it was right at hand.
Instead of moving it around, why don't you create and enable a Search tab? That would be the best because that was the way it used to be in the old Offices AND according to UI experts that is still the best to have a separate Edit/Search menu or tab for the copy paste search actions. Search was always at hand in the old old versions, and could be found easily in the menu!
To be honest I still do NOT like this idea of ribbons instead of menus, it is screwed up.
If you want to keep at it at least you should make design decisions with a SOBER MIND.
I am not big on having to need to Google every time you change something. Your decisions are illogical. At least you should give the opportunity to the poor user to be able to choose. When you do something stupid like this, just pop up a small notification to offer to switch to use the modified UI element in the new location or keep as is. What you do is non-sense. Not user-friendly at all. And I am not an old person yet I think this.