Which partly makes the CEO so key. Dispassionately, what Uber needs right now is someone who can convince investors to keep the money taps open. If you lose $X BILLION a year, you need $X Billion + y% to maintain that burn rate. So the question is:

Is there a CEO that can continue to raise money, OR that can turn a $X Billion loss into a mild loss, whilst still raising the money required to keep the enterprise alive?

That's a pretty damned niche request!