Don't forget that we're still talking about the possible change to 4-3-3. In that case we'd have a hard time lining both Llorente and Tevez, or in other words, it would be kind of impossible. Sure, we could rotate them, but it would be a pity to bench either of them -- in which case we'd look for a possible -- if there's some good transfer opened up. At the moment, that seems to be Sanchez. Would it be good to sell Llorente in order to finance Sanchez? I don't know. It would be a pretty big change and I for one think that Llorente did quite well considering it's his first year here.
So, even if comes to his possible departure, I think we'd only do it so we can fit the new system more easily, since playing Tevez on the left would be meh.