My thought exactly
I saw a clip of Rodri giving a speech in the changing room to the team where he says "we've one 4 of the last 5 premier leagues and we're gonna do it again". So he's clearly someome who's willing to speak up and lead and motivate
Add that with how influential he is on the pitch, I think he would be a very good captain.
Kev may be a good choice too, he even argues back with Pep from the pitch, so he clearly has passion and speaks up. Plus you can see how much respect the players have for his ability.