I think he is doing a good job, but it wil take several years until the company gets stability.
That is, if they do... I have to admit many of their projects could be huge flops. Blu-Ray wasted too much money to kill HD DVD, Blu-Ray Archival can be obsolete by the time it comes out, 4kTVs didn't convinced me until now, Vita floped, Morpheus sounds too risky and i don't know how well PSnow and PSTV are going to be.
If you consider movies are a very risky investment by default and they could get another After Earth+White House year combo, i can understand if the stock holders get worried.