As for obfuscated CSS classes, this is likely to use scoped CSS, which allows for components to share class names but not share class attributes.
That's kind of against the point of CSS, but it's also a useful dev tool to make your code more readable. I agree that it can be annoying on the user side, but it makes sense that they made this change.
Also, most likely, these change every deploy (when the depedency manager builds the app).