I have absolutely no idea how to answer that, apart from to say Pep has always shown a propensity to over-complicate matters, when the logic of Occam's Razor should be applied... The simplest explanation is usually the one closest to the truth. Why would Pep revert to inverted FB's, when his famed 4-3-3 was working so well? It had to be on his instruction, & if it was, it makes the mind boggle as to why...
We've seen this when Guardiola has reserved the most curious of selections & tactics for our biggest matches, leading to shock defeats, like the CL Final against Chelsea. He inexplicably changed what had worked so well for us that season & fucked us for that final.
However, I recall Pep's penultimate pre-match CL Final interview as we prepared to face Inter, where he told the world's media "Don't worry guys, I won't over-think this final". The only shock he delivered was dropping an in-form Walker for Akanji, but luckily it didn't affect us too much & we went on to complete the treble.
It's during that summer that we needed to start our succession planning, which we failed to do. We had the funds, & fans were crying out for us to go big, but our big purchase was a 21 year old Gvardiol. We were also not forceful enough in moving Kalvin Philips on, especially after Rodri's warning that he was close to burnout & feared for his health... A warning we failed to heed with devastating consequences!
As Rat Boy said during the match against the Dippers, the problem isn't having 30+ year olds playing in your team, it's when half your team are 30+ year olds it becomes an issue. We've got a lot of rebuilding to do, but our rivals & the clubs who possess our transfer targets know this too which weakens our negotiating position in the transfer market.
This is all on City. We've allowed this situation to develop for the last two years & now our usual squad evolution has now become a critical squad revolution. We need younger replacements for our ageing Superstars, as we can't afford time for the promising youngsters to develop as we did with Foden.