[Erax]

In SEIV, big ships rule. I see this more as a premise than as an imbalance. But even if we agree that it is, in fact, an imbalance, I think the real source is the propulsion model, although the mounts are also an important factor.

In the unmodded game, a battle cruiser and an escort with the same speed will have the same tonnage set aside for engines. This obviously benefits larger ships and is the reason why QNP was developed.

Allowing larger ships to have larger, more efficient mounts seems reasonable to me; allowing them to have vastly more efficient engines does not.

That's my 2 cents.