Literally the only thing I can find about the new Yahoo Mail that I like is the fact that it's possible to get rid of the stupid date dividers in the inbox. The themes are physically painful to look at.

Everything is incredibly lopsided with the huge wasted space in the sidebar on the right side.

There isn't enough contrast, and there's no sense of flow in the design with the level of minimalism and everything the same color. It makes it very difficult to actually focus on anything. The way that the emails go from light to dark when they're viewed is very ugly and confusing and makes it look more like they're all selected rather than just viewed, which keeps making me think I'm at risk of deleting multiple emails. Navigating to anything is harder and more confusing. The lack of any color contrast in either light or dark view is very visually straining and frustrating.

I was excited about the new look for a minute when I realized that the date dividers were finally gone! But it's massively, massively worse in every other way.