Certainly if he continues on performing in mediocre level i would want to, there won't be anyone interested in him and he may block someone's else developement in our Case Montoya of getting a starting place..
I don't think any team would want him.. Unless he goes back to Sevilla. Plus, he's getting old already.. If he's leaving I think our management my get another experienced old defender as well? Ugh.. Horrifying.
I too feel Dani's time at club is up. He really doesn't contribute anything meaningful to the team except gaping holes for Pique/Mascherano to cover. At least Alba sprints back when the opposition counter. Montoya (when at his best) is a lot more conservative going forward and a lot more reliable in defense. He deserves to play some matches. In the future, a more defensive minded RB should be brought in to compliment Alba much like Abidal complimented Dani.
Alves still got great understanding with teammates, crazy runs, going inside the pitch, the 1-2s with Leo. Still not gonna be easy to let him go unless Montoya is being played more often this season to get those things from Dani.