Middling. He keeps making decisions based on how he thinks (and I emphasize _thinks_, because this sort of evaluation of mass public reaction is not really his core expertise) they will play out in the media and politically. The most recent example is him basically saying "yeah, it makes sense for the UK to do first-doses-first, but it doesn't make sense for the US, because people here would not stand for it" and completely dodging the actual question at hand, which is which vaccination regime is better for most rapidly decreasing SARS-Cov-2 infection and COVID-19 deaths. Which is first-doses-first, from everything I can tell of the actual scientific evidence, and I am quite sure he knows that.
So basically, he's walking a line between making the right scientific decisions and protecting his position enough (in his estimation) that he gets to make decisions at all, which is compromising some of the decisions he's making.