I don't think it's the San Juan bug. He looked good in Colombia. Also don't think it's media stuff, actually I used to think he was a little too much in love with himself and the camera, but he has surprised me and seems in fact to have a straight head on his shoulders and be very focused. (At least that's what I made from what I read, but I don't live in France, so there you might get a different impression.) I thought on the contrary, maybe a little overtraining? Or, I don't know his schedule, something to do with how much/ when altitude training? It might also be mentally difficult for him to start the season not going all out, that's what he seems so be good at?
Anyway, I would expect him to show a lower profile this year, wish him the best though.