Used My Yahoo for decades. The new format is useless. If a change back to the My Yahoo is not made in the next week, I will be leaving Yahoo.

There are alternatives where I can personalize my news, weather, stock portfolio, etc.
I am not against change, but this change gets rid of the reason for having Yahoo at all, Sorry but I can't wait too long for your decision because on rely on my personal information on a daily basis.
Hopefully Yahoo realize the mistake it has made and quickly rectifies it.