I don't think that's true at all. WifS has said, repeatedly, that players don't "cover" for other players. Meaning a ball hit to RF cannot be caught by a high range CF or 2B. While some of what they've said has proven to be incorrect, I don't think this is. You're thinking of the field as a checkerboard where a high range player can cover 8 squares and a low range guy can only cover 2. While that might make for an interesting board game, it doesn't feel right in a sim.