I really like this approach, especially with the uncertainty of where Bautista and Encarnacion are going to be next year.
However it is this team got here, it's pretty much built to win now-ish, in that we probably have a better chance to win this season than next. Pompey is certainly better than Lake and Carrera, in just about any and every capacity. I think they should definitely try to find a way to work Pompey into all the roles you suggested at the major league level, in the interest of giving this team the best chance to win.