But isn't that normal that they sell players when the time has come? Aubameyang is now 34 and yes he did score some goals in his 18 games for Barcelona, but his performance in Chelsea was not exactly the perfect application for his return and stay in Barcelona. They have said for a long time that they want to start a whole new project and rebuild the team over time to get back to the Barcelona that was a Champions League favorite. I think keeping Aubameyang wouldn't have been a decision that is consistent with their plans.
We are not talking about his performance in Chelsea, it is a different point. If he can't play well in Chelsea, it is because he rarely played and Chelsea can't apply a proper tactic. In fact, Aubameyang played very well during he was in Barcelona. But everything became worse after Barcelona sold him, he moved to a wrong team. I'm sure Aubameyang may play in a good form if he stayed in Barcelona at the moment. However, Barcelona management doesn't want him to stay, he has no choice but he must leave the club.
Everything became worse when they sold him? They got Lewandowski instead or not and he became the best striker in that season. But whatever, I am not arguing with you that Aubameyang is a good player, he is and I was a fan of him when he was in his prime, but I think that Barcelona wanted to make a real cut on my positions and sign younger players and build something coherent over time. In retrospect it is often easier to argue against or for a case with all the new information one has, but I do understand that Barcelona took this measure and wants to renew their striker line step by step.