Themes
I am extremely disappointed with the new Yahoo Mail design. The Classic version was much more user-friendly, easier to navigate, and easier on the eyes.
One of the biggest disappointments is the removal of themes. Having basically a black or white background is not enough customization, and both options can be uncomfortable to look at for long periods of time. The old themes made Yahoo Mail more visually appealing and allowed users to choose a background that worked better for them.
The Classic version also made everything much easier to find. The layout was straightforward, familiar, and functional. With the new version, simple tasks feel unnecessarily complicated because features and options are not as easy to locate.
Please listen to longtime Yahoo Mail users and bring back more of the Classic features, especially themes and the simpler layout. Newer does not always mean better. The Classic version was easier to use, easier on the eyes, and overall a much better experience.