So, we can say that old is gold and may be they may realise their mistake as brands take time to build and there was no reason why they should have had tinkered with the logo as we find no compelling reason.
Have a look at old Yahoo logo
The unveiled logo is as given below and for that Yahoo CEO Marissa Mayer thanked Max Ma, a design intern at the company, for helping come up with the design.
The proposed Yahoo logo which was shot down is as given below