It was a massive mistake not playing Rodri against CFC but Rodri had a mare in the league game against them. I would stick with Rodri. I don't think he's as nimble as some defensive midfielders and he's a bit slow but offensively he's very good.
And if not, there's Tommy Doyle.
I'd put all my eggs in the Grealish basket. He's the best player in the Premier League imo. On a par with Foden and KDB.
No team could resist a side with Foden, Grealish, and KDB in midfield. Simply impossible to stop.
If Man Utd got Grealish then they would instantly be title contenders. Best midfielder player I have seen outside of Manchester City in a long while.