With all due respect mate, I really don't think you know how football works.
All Guardiola had to do when he arrived was identify those existing players who could or couldn't work in his system. He then replaced the few who couldn't with players who could. It's not rocket science. Football is a simple game.
Over subsequent seasons, all he's had to do is 'tweak' here and there. Obviously, he's been exceptionally successful, thanks to Txiki and himself identifying the right players to fit his system.
The simple fact is that the foundations had already been laid by Mancini and Pellegrini, alongside Gary Cook and Txiki respectively.
The current situation is that the foundations have not been adequately maintained over the past couple of seasons. As such, our succession planning in respect of players like KDB, Gundogan, Bernardo, Mahrez, etc has been very poor.
The rebuild will be a two or three season job, and Pep won't be around to see it through. In the circumstances, unless he plans to stay on at City as DoF in the future, I think it would be wrong for him to be allowed to influence / predetermine his successor's team plans.
A new broom should be allowed to sweep clean.