I personally think it would be more beneficial to try and create the most balanced lineup possible, mixing and matching lefties and righties, but there's always that one platoon (For me it's Mike Schmidt and Dodgers Legend Jim Thome at first base), that it would be nice to have a "vs LHP" and "vs RHP" option within each squad, allowing a hair more balance to your squad. It's not perfect, but it'd be a bit better than it is now