Is the "NEW YAHOO" really better? Let us decide.
Yahoo was king of the IT hill, and you once owned the browser market...
BUT
Lost it to Google, however some of us stayed loyal as we continued to use "yahoo.com" for our email and what I believe is the best customizable home page in "My Yahoo" ...
I suggest you leave both new and current (not old) in place...
Then
In 6-12 months see what your customers have adopted, then decide.
64th
ranked

-
S Cuthbert commented
oh PLEASE somebody read this