You can Improve it greatly by changing it back to how it used to be.
i hate it. genuinely. if i could easily leave yahoo as a service altogether i would have left the last time these changes were forced upon your users. i wish i had more terrible things to say here about the changes but i cant stand wasting anymore of my day on this. this is at least the second time an entire UI redesign has been forced upon your users and i'd be willing to bet that the vast majority of your users didnt want or care for those changes in the first place.
2nd
ranked