Gundogan DM and Foden CA/AM? Sounds like UCL final and we all know the result...
One game is a small basis for big generalisations. Many of the players weren't in top form at the end of the season. Only Walker and Jesus (from the bench) did well.
Anyway, who could replace Rodri if necessary? Without pointing out an alternative your response is pretty meaningless. Who could do better than Gundogan at DM? Ferna who is alteady well past his best or Lavia who has't played vs PL/CL teams and needs at least 2-3 years to reach the necessary level?