I agree that Abreu will not suddenly knock out 30 HR again, but, in the Yanks lineup he was not counted on for the long-ball. We all know he can deliver the long ball if that is what he focuses his swing on (HR derby). It may make no difference, but with the kind of talent, plate discipline, and experience that Abreu posseses as a ball player it would not surprise me if he may try to pick up the slack in the power department with Vlad gone.
Players will play within themselves to help the team, but when the team gets a flat tire, the other 3 have to pick up the slack, Abreu could be thinking the same thing.
All speculation but I think it has merit. I'm not saying he will suddenly become a power threat, though it would not surprise me to see him hit 20 HR and run more often to put runners in scoring position with Vlad out.