just look at his playtime at barcelona, he was the same 50-60 minute per match guy there too. rarely a full 90 minute player since he moved to europe. and he had regular pre-seasons at barcelona.
i still couldn't find anything special in him besides holding the ball and the accuracy of his short, risk-free passes. he can still provide balance with this in a 3-man midfield, and i do think it wasn't a coincidence during our good run in january that we usually played with 3 cm's regardless of the formation.
anyway, when you're available and the coach still picks danilo as a cm, that should be a warning sign.