thats not the point at all, there is always a numerical "best" you can have.Just a heads up:
Pushing Plasma to L only would:
1) Not change the fact that there's a best Battleship.
2) Not change the fact that there would be essentially one Cruiser which is the best ship in the game.
3) Maybe, possibly make lasers more effective. (it would probably just make other weapon types dominate in the medium slot, perhaps Gauss)
Honestly, I'd rather see buffs to missiles and Destroyer evasion, a re-design for lasers, and a nerf to Cruiser health.
the point is, that plasma is simply the best thing you can have since it has no drawbacks and is basically a a T6 Laser at the end.
Other weapons are perfectly fine with Sidegrade-Techs, just Plasma ignores that rule. As i said, Two Large Plasmas are even nearly equal to 1 XL Lance, while 2 Large Kinetics are still vastly different to 1 XL Giga Cannon
redesigning ships doesnt fit here at all
redesigning lasers wouldnt be needed if plasma would actually follow the rules
and buffs to missiles is a whole different topic where we should wait until thrusday when we get Utopias Changelog where the missiles are buffed. Of course Missiles need a rework, but plasma is exactly the opposite end of the balance problems