False 9 has always been a hallmark in Guardiola's tactics. He first played Messi there and I think he tried Fabregas there too. When he was at Bayern, he sometimes played Muller, and I think tried to play Gotze there. Less of the idea of having to have a False 9, Pep has always favored his frontman to be mobile, hard working, fluid - to make space & create for his David Villas, Pedros, Muller, Sterling, etc. The outlier he had I guess would be Lewandowski, who is so good as a centre forward, that it makes sense to not push him too far away from the box.Since he came back from his injury earlier this season he's barely been used as a typical lone forward. It's been as a deeper defensive forward or false 9, or in today's case on the left.
I've been trying to figure out if this is Pep seeing Jesus in a different capacity, or whether the false 9 thing is a tactical shift that he was always working towards. I have felt that for a while Pep has been aiming to have a very fluid attacking unit. Sterling, Foden, De Bruyne, and Torres all can provide that on paper with Jesus.
What's difficult is that Aguero's been unavailable, and how he'd play would help us understand a lot of this.
Pep focuses alot on Jesus' work rate as his most outstanding attribute, in my opinion. Jesus employed on the wings has the capability and willingness to track back, whilst having the instincts of a striker to break into the box (all these seen vs Real Madrid last season). Whether Jesus playing more on the left will be something Pep is working on remains to be seen, but I feel it wouldn't be such a bad idea.