I suggest even lower game shape
Either he's training GS or gotten a lucky update
greater possibilities for injury
As it was stated in the other reply more minutes does result in a greater injury chance
fewer points per match as a consequence of such rat race.
He's already scoring less points due to playing 48 the reason he's number 1 is more due to the fact that there is no player in his league that can stop him.
Why should there be further consequences if you play a guy 48 minutes? You only see it done in the lower leagues, when you get to the higher divisions the current consequences on their productivity already cause the vast majority of teams not to do it.