I was thinking about this today and I'm wondering if it's just a case of DOL trying to complete the O'Learyification of the side..
Before he arrived, Daz Vass was a first team regular, now he's sold off. Peter Enkleman was goalkeeper, and he's been replaced. JPA was consigned to the subs bench, he's now his next door neighbour. Solano, McCann are first choice midfielders, Dion and Ronny Johnsen are gone.
Jlloyd Samuel, Mellberg, Barry and Delaney are the only members of the first team who were in situ when O'Leary was appointed. ( And I think JLloyd was really only on the fringes then..) Delaney is being denied a new contract and has almost been replaced by Hughes. So, Mellberg and Barry are the last ones from the pre-DOL era, so to speak.
Anyway, I don't know what that means. I suppose every manager wants to bring in his own players and remove those from previous regimes. Maybe thats why he's sold DV. Just doesn't fit into the manager's plan.