On all topics people are mentioning Roberto as a midfielder.
Imo:
1. if he'll play well, he play as a RB 60-70% of time and he will rotate with Semedo forever.
We will just have good 2 RBs, and that's it.
From time to time, he will play a match or two as a Cm, Rm or a Rw, when we'll have lost of injuries.
2. if Semedo will improve, instead 70:30 time, he will play 50% of time and rotate with Roberto.
For guys who want him as a midfielder, he goes forward way too often.
In Ev's current 442, he could have played as a forward when we didn't have Coutinho and Dembele and when we played with Iniesta-Busquets-Rakitic-Paulinho/Gomes and similar.
He offers a fresh spark and an attacking option in that system.
But now when we have too many attacking players in a team (Messi, Suarez, Coutinho, Iniesta, Dembele), I don't think that Roberto is a good option anymore for a defensive CM.
He could be a RM instead of Dembele, but I guess that people see him as the next Rakitic.
Plus, not to mention that we have almost 10-15 midfield options:
1. Coutinho
2. Iniesta
3. Dembele
4. Rakitic
5. Paulinho
6. Gomes
7. Denis
8. Alena
9. Samper
10. Busquets
11. Oriol
12. Rafinha
13. Arthur
14. Messi dropping deep also
15. Sergi Roberto
I don't see too much sense in mentioning Roberto as a CM on so many topics.