I thought Mayim was a weak host, humorless, self-absorbed, with a number of annoying habits, like chuckling almost every time a contestant got a question right.
I would rather have seen Ken or Buzzy host. It is funny though, probably one of the reasons Ken and Buzzy even got the chance to host was Mike's desire to keep the guest host pool weak, so that he, Mike, would stand out even more.
Even though they did well, I think there's little chance that Ken or Buzzy will get the permanent host gig. Sony is going to go for a "celeb" with a little more name recognition among the masses. Sony is completely in the driver's seat, more concerned with optics than quality.