Do not argue for firing Ancelotti, but since you are asking. I would replace Brands with Ragnick, and give him all the authority to make the changes he thought were necessary.
"The playing style should be highly recognisable – so much so that, even on a bad day, you can still recognise the kind of football that the team wants to play.
By doing that, you create an identity across the whole club. Not only with the players, but also the coaching staff and even the fans".
Ralf Rangnick on the philosophy he used to build success at RB Leipzig and Red Bull Salzburg, and why he and Jürgen Klopp get on so well
www.coachesvoice.com
Of course, this is just fantasy, but your question was hypothetical.