Whatever issues Rodri (or Gundogan I suppose) have, it's just not constructive to compare him to this imaginary Fernandinho, who is supposed to have the defensive might of Kanté, combined with the metronomic ability of Busquets, combined with the playmaking skills of Pirlo. He has been a great DM I must say, but his abilities are artificially inflated more than most, probably due to his workrate (which in fairness has been phenomenal, on and off the pitch).
It doesn't do Fernandinho any favours either. Because whenever he comes back into the team and plays at the exact level he's supposed to people act like he's had this massive fall from grace, when he hasn't.
It's been similar to discussions on Jesus and Aguero, whereby Aguero never misses a chance, single handedly wins every big game, is a perfect link up player and so on and so on. It's not true, and it only makes people mad at Aguero when he comes into the team and isn't absolutely flawless (although personally it's more forgivable as Aguero has a decade of brilliance behind him).