I’d say Rodri or Rice are top top players and they are absolutely miles better right now. He’d have to step up massively to be near that level. Not saying he can’t, but would surprise me.
For me, it won’t be an issue. The game time that Rodri and Rice have does improve them; I think once Onana is playing with a better coach and more fluent system, he’ll just look next level
his issue is consistency, sometimes he plays the game in second gear and some he look anonymous.
But when the team looks to have around 30% of the ball for most games, he’s essentially just an expensive athlete in this team