We already have individual LB3's. Have you not seen more than a LB2 go off? The devs are obsessed with balance, they can't have one job have a better LB than another of the same role or it'll start to be preferred in content (yes this happens already to some degree with top-tier groups). And if they all work the same/hit for the same, then why bother? They already all look different at level 3