I like Ken and especially his come back story but he just doesn't seem fully back yet. Based purely on observation, it looks like he holds back once something squirrely happens. Maybe it's the bike, or something else going on in his life but there is a hesitancy that looks like it's too consistent to be temporary.
It's easy to be an armchair riding coach but from a fan perspective, and a rider myself, I just don't see him coming back to his glory days before he broke his arm. There is such a huge mental portion of the sport and at the highest level it can make a huge impact on performance and race results. How many times in your own life have you crashed on a particular obstacle only to be fearful of it the next time? It blows my mind at how those pros can crash hard, get up and race to the front. Pure mental toughness that most people can only wish for.
I wish him the very best and hope he surprises me in the future, even if it screws up my SX Fantacy picks!