Manchester City are still having problems when in the last 2 matches there is no Rodri as their attack organizer but on the other hand I think Pep already knows what they will do in this match.
It would be very bad if in the end Pep had to lose points for the 3rd time in a row in this match so I think he will do his best so that Manchester City can bring 3 points at Etihad this week.
Rodri seems to play again because he already recovered from the injured problem. Although De Bruyne sill can't play, Pep Guardiola can put Rodri as the starter again at least. I think Man City midfield will perform better when Rodri can return to the squad. Rodri always has an important role to keep the balance of Man City midfield line.
I guess being Brighton right now is the worst timing they could have because Manchester City won't allow for another game to end with neither a draw nor a loss after losing two games in a row. This would be a result that literally nobody in their mind can imagine right now. Guardiola will make sure that this won't happen and yes, it is also a home game for Manchester City which obviously doesn't make it any easier for Brighton. It would need some negligibility on part of Manchester City in order for Brighton to have a chance like they did have against Manchester United at Old Trafford. But Pep knows how to sharpen their senses to prevent that from happening.