Honestly, I think the core of the team's philosophy/tactics will remain 433 - but the signing of an orthodox left back/wing back and having genuine strikers on the books will absolutely give Pep more room to move things around in game or to come up with one off tactics for certain opponents.
One thing which has struck me - if you go back to Pep's time at Bayern he used tons more formations than he has done at City. I think part of that was just him keeping himself amused in a flat track league, but I also think the fact he had more versatile players and more intelligent players allowed him to do that.
Our squad is getting to that stage now where you can see him being able to move things around more.