Having many quality players is good because it will make Real Madrid to perform well. As long as there are no many players who compete with a certain position, there is no difficulty to face by Ancelotti. Mbappe is the only striker in Real Madrid, he even has no competitor. Even Real Madrid signs Joselu or another new striker, Mbappe still can be in the main lineup because Mbappe can play as a winger.
Yep. Bellingham will return to his best position as a center midfielder. There are Tchouameni, Camavinga, and Valverde who can be the other options for the midfielders position. Not sure who will be the main 3 midfielders in Real Madrid main lineup, it should depend on the situation. Tchouameni also can play as a center defender if it is needed. So, Ancelotti lots of options now.
For example, like the semifinals and finals of the Champions League last season and he made a big contribution to Real Madrid so that they managed to get the trophy. I am sure the more quality players a team has, the easier it will be for them to achieve success because there are many choices in making strategies..