Agree, everything depends on perspective. Taking last season as a base, I'd say we're definitely going forward, though you don't have to expect anything else with Pep ;) Maybe I'm just too demanding - watching Guardiola's previous teams has set high standards for me)
As for the flexibility - the only reason that prevented Pep from being as flexible last season is terrible fullbacks. 352 isn't more or less pragmatic than 433, it has its advantages and downsides. I bet that we'll use both this season depending on the opposition.
I guess you'd find interesting the explanation of basic reasons to use different formations (though it's probably not 100% applicable to City, as we're less wing-focused team):
https://thetacticalanalyst.wordpress.com/2016/06/06/bayern-munich-a-mega-analysis/
The author is MTK Budapest's match analyst.
Edit: didn't follow your discussion with Zin on KdB so my comment may be off the mark).