So, just got upgraded unwillingly to the latest version.  yes yes, I understand that's part of the package of Odoo Cloud. I was expecting some minor changes (0.1 version increase), not a full blown interface redo.   

Some highlights

• The text in the left sidebar of the settings/configuration menu is a light grey and barely readable.  
• • It doesn't follow the Dark Mode at all with a white background.  Light grey text on a white background. That's not dark. 
• The buttons at the top of the interface for Produce All, Validate, and others are all smaller now.  No, I didn't zoom in or out, they are legitimately smaller and much farther away from being useful, and being the primary buttons to use on the screens makes the change very unwelcome. 
• The tabs for Allocation, Vendor Bills, Bills of Material and more are also moved around, and it doesn't seem there's largely a purpose for the move.  They're just smaller, harder to read, and awkwardly placed. 
• Why did you change the colors?  
• • Is there a blog I can follow along, because I haven't seen any release notes.  I would've liked to follow along and say, "Hey, those interface changes aren't needed."  
  • I've got this grey-on-grey Draft State icon, these hideous neon orange In Progress icons, and a blue "Confirmed" icon, which seems similar, but my eyes have trouble focusing between the two, a problem I didn't have before. 

In Summary, the release, which by all communicated accounts should have been a minor 0.1 version change for bugs and other fixes, has completely changed the interface for the worse, and actual changes were poorly communicated.  And no, testing would not have helped, by your own admission, the change was involuntary.