I think have two aspect how reach agreement deal transfer Aubameyang to Chelsea, first aspect Barcelona still difficult and can't registering with new player Jules Koundé after financial problem, but right now after Aubameyang moving to Chelsea they have chance to register Jules Koundé for next match and he has missed two match on La Liga with Barcelona. Second aspect agreement reach by Aubameyang want to play for Chelsea, he realize about less chance become regular player with Barcelona after success get Robert Lewandowski from Bayern Munich. I think good agreement deal between Chelsea and Barcelona, exactly with Chelsea still not find with new central forward after leaving by Lukaku and Timo Warner.
How would the situation not have changed if Depay had moved to Juventus first? Barcelona are hoping for a good offer for Aubameyang and Chelsea are expected to do. Kounde is the reason why Barcelona want to make deals to sell several players, so it is only natural that Barcelona are now rumored to be accepting Chelsea's offer for Aubameyang.
It is not difficult for Chelsea to get Aubameyang from Barcelona. He is even rumored to have reached an agreement with Chelsea personally, so I think the negotiations are coming to an end. I wish Aubameyang a lot of success at Chelsea if this deal goes well, he will be fine.