That depends. You could say a person who can employ multiple formations is tactically versatile.
Making each of those work perfectly, is tactical skill
Sticking to always the same formation, but changing the approach, runlines and tactical tasks for each opponent, is also tactical skill
An opponent using a highly effecting double wing system for example. Blocking the wings could tempt into using a 4 backline. or, you could stick to your single wing 352 but change tactical roles and support instructions, to dislocate the wing play.
I tought Conte was pretty good at adapting the player roles to the opponent without altering the formation, wouldnt you say ?