Since Kylian Mbappe joined Real Madrid, the Real Madrid team will perform more strongly, the attacking department has been strengthened considerably. Having lost Cristiano Ronaldo and Karim Benzema for a long time, the team was without a striker until now with Mbappe. But Real Madrid team has performed much better than this season's Borussia Dortmund team. And of course they have won the title so there is a possibility of better performance due to the addition of stickers.
Not that he wasn`t strong before, eh Real Madrid has always been a very strong and difficult team to face
I would say better, since they took him the percentages of success of an attack, that is that it ends with a goal, are much higher and therefore they simply score more goals, which is no small thing but that`s the job of the attacker
It cannot be denied that the presence of Kylian Mbappe will make Real Madrid's front line much stronger.
However, we cannot yet measure overall strength for next season even though Real Madrid remains the favorite team, but believe me, defending the CL title is very difficult even though Real Madrid was the only team capable of doing this several years ago.