i agree if they allow mixing in matching i think that would be first thing i didn't like about fallout 4 not mention stupid .
thats like putting engine from m1a2 Abrams in leopard 2 with t 14 armata turret with french GIAT (Nexter) CN120-26 120mm gun.
yes it still should be symmetric in all the places that it was before. there is a reason almost ever suit of armour both real and fictional works are symmetric constructs more or less.