It is a pity that Frenkie de Jong ultimately stayed at Barcelona. He also seems to be a kind of 2nd choice there and will often start on the couch. At Chelsea or United, he would certainly have become a base player. Maybe another attempt in December, but since it didn't work out recently, I don't think it will work in the winter either. He wants to stay at Barcelona at all costs because Barcelona still have to pay him a lot of money. Unless a club wants to take over that debt.
Frankie De Jong rejected Bayern Munich and Manchester United offers and now playing into Barcelona as second choice because he didn't want to leave this club, and secondly he has issues with his salary errors which was on Barcelona side, and they are not paying which is pity but right now both parties working on this issue which can solved in coming days and most chances he will join German Giant Bayern Munich even right now all just personal views or having some unauthorized news but still things can happen in winter transfer or coming season because he is not fitting into Xavi system.
Barcelona's management is also not happy with him, and they want to offload him in coming season, but as I mention the biggest problem is salary errors which needs to be settled as this is surely hurting Barcelona reputation as well.