Roberto's situation really shouldn't be this complicated. He's a decent midfielder, who's not good enough to be a starter but not that bad that he can't be useful for us as a squad player. Pretty versatile, and has some qualities that could be useful for rotating/coming off the bench. Most teams have players like him who are utility players and teams are generally happy.
For some reason, managers here seem to struggle with a way to fit him into weird positions like RB, LB, RW, etc. in some sort of "he has to play no matter what" mentality, rather than using him as a 4th/5th midfielder like he should be used. Then again, Valverde IMO doesn't even make the 'average' manager cut, so not expecting him to utilize him well this season either.