I think it's conventional to give Mayer the benefit of the doubt, I certainly did for a long time, but if there's one responsibility that lies squarely in the hands of the CEO it's to define a clear, unifying vision for the company that catalyzes employees, users and investors. Mayer failed to do this, I'm not sure she even tried. This whole time she's been fixated on minutia while remaining casually oblivious to the big picture.

Let's compare mission statements. Google's mission is to "organize the world's information and make it universally accessible and useful". Absolutely. Makes sense. Tesla's mission is to "accelerate the world's transition to sustainable transport". Yes, I can get behind that. Every move Tesla makes reflects their mission.

But what's Yahoo's Mission? (and now that I Google it, it has changed again, for the 25th time) "Yahoo is a guide focused on informing, connecting, and entertaining our users".

I'm Really not sure how to connect that with the sick parade of misfit properties circling the drain we call 'Yahoo'. Though we can all make our best guess, I'm not sure anyone clearly understands what Yahoo is, or what it's trying to be. Not even Marissa Mayer. That's job #1 for a CEO.