We don't play through our striker anyways, we play through our wingers, so if they are off then it's all off.
The team just played all of last season in that way. Even when Aguero played (a real striker) we didn't do it. The reason it works with Jesus is because he understands and knows to drop deep and has great hold up play to faciliate the system, this is why I really rate Jesus.
Also, while in theory I get why Pep played Grealish as the 10 next to Ferran, Grealish isn't a goal scorer, most of his plaudits at Villa were about his ability to create.
In that sense, it would have been smarter (IMO) if Pep played Grealish LW, and played Sterling as a striker next to Ferran and just committed to 442 if that's what he wants to do. The wingers are then both creators, and the strikers are both players who want to get behind and score.
I know Ferran got alot of flack from this game, but he did make alot of runs. He has some work to do and missed on Cancelo's cross, but he didn't get much service tbh.