THe situation is a terrible one in every respect. First, he was an election ploy signing - a player who barely played at RB was suddenly brought in to eventually succede Alves. Then when you know there is an insufficient level last season coupled with a falling out with the coach, you have to resolve it. Either they come to an agreement and he stays or he is moved. The summer transfer window comes & goes and he's still a Barcelona player. Either Vidal was led to believe he had a shot at being a part of the rotation and Lucho simply changed his mind or the club screwed the pooch altogether by not upgrading that position.
Now, we have a player in the locker room who doesn't want to be here which will not lead to a great atmosphere until it is remedied somehow. Moreover, there isn't really any depth at RB unless Palencia can contribute
Interestingly enough, Bartra played RB for a while in the youth teams and for his early debuts with the 1st team
It's a lousy situation that has been inexplicably misjudged/mishandled