I meant we shall take a look at how important busquets for barcelona. He was also a captain of the club. Ansi fati may not be used by xavi. De jong has more potential rather than ansu fati. Raphinha will be replacing dembele's position. I shall remind you of the previous match raphinha has played by xavi as replacement for dembele.
Busquet got a serious injury which is bad for him and Barcelona too but just months ago, Barcelona fans wanted to see Busquet leaving the club. They wanted something like what happened with Pique and now they considered he is so important for the club and are missing Busquet a lot. People are so complicated and sometimes hard to understand them.
Fati is a club future and his position is safely at least in a next season. About De Jong, I believe he will leave sooner or later because Xavi did not have plan to use the player a lot. Raphinha is like over estimated and over valued on transfer market. His performance with Brazil in World Cup 2022 is not good enough to convince me and his performance for Barcelona is not outstanding too.
I think that the same strategy will be used against manchester united.
Barcelona must be careful caused by MU is also in its best performance at this moment.
Barcelona usually play with their traditional tactics, tiki-taka and some sort of different versions of tiki-taka. In general, they don't change their playing style and formation. Perhaps they will use it again in matches with Manchester United in Europa League.