Luis Enrique possibly thought that he needs to use a strong squad to help PSG have a first winning in 2024. He possibly believed it is a good way to start a new year and to prepare for bigger and more difficult matches after this one.
Don't rotate star players when he has chances is something I really disagree. Players are human and they can not play in all matches without appropriate rotations and times to take rest.
That's his job as a striker and it's quite strange when he can't score goals in several consecutive matches because a striker can't stop scoring goals if he wants to be the best player. Mbappe has provided a lot of color for Luis Enrique's team and perhaps luck has not been there so he has had so much difficulty bringing PSG to become one of the favorite teams in the Champions League. Now his future is starting to be discussed and everyone hopes he will go to a club that can make his wishes come true and Real Madrid is the team most linked to him.
The coach better understands the level of need and regarding not rotating players, perhaps Luis Enrique has predicted that the match will not end badly for his team. So he tried several schemes in the match to see the quality of the players and maybe this could be a reference for how he could make changes to certain strategies.