I don't want to see the flash, but I want to see a player take on a man or at least make them commit.I agree with you 100%. The problem is that if he does go 'full Jack' at some point, we may find he has the same, ultimately negative, impact that Rodney Marsh had in the 70s.
Jack's learning how to play for Pep Guardiola. He'll have his moments, but I doubt we'll see him overdoing the flashy bits.