I do not want these on normal multiplayer servers theses should be for rp scenarios where the rp ship isn't as strong as it should be or maybe the rp ships is too strong for the scenario you want to play so you weaken it. I am thinking the multiplier block be just a admin thing so you can have more options in making your rp accurate battles. like star wars and star trek can't really make some of the small ships as powerful as they should be because of all the details needed.
If this is on something that you are doing in making a server then you can modify the weapons yourself. Punch through and Overdrive buff smaller weapons, Piercing effect reduces the damage VS shields, EMP, Stop/push/pull effects reduce both Shield and block damage. The systems are there, you just have to be creative and not overly lazy.
As for RP ships, there is a big difference between an exact replica/model of the ship in game, a Functioning copy of that said ship, and a Systems-heavy one. Do people really care on an RP ship that there isnt 100 (Currently) unusable crew rooms on such a tiny build, and only room for 5 people on the bridge, 5 in engineering, and 5 stationed elsewhere etc. So long as on an RP ship there is sufficient Accommodation to cover the "systems" placed down then people are fine. At a minimum Builds would need:
Crew Quarters and/ Officers quarters. Maybe simple bathrooms too
Not all ships need a medbay, but even then you dont need room for all the crew at once in them
Recreation and/or eating space. Perhaps a small Kitchen
Airlocks and/or USD capable
Some sort of fake engineering areas on anything larger than 1k mass
Cargo storage (Food/supplies, etc)
Bridge/tactical Bridge / Cockpit
Sufficient corridor space to go A to B
The art is not in filling the entire ship with RP space. That space is a massive premium on a space vessel. So condensing it down is vital for military vessels. Civilian ships can splurge out a little for crew comfort. Its also a bad idea to take Star Trek ships as a basic model - Most starmade ships are never away from home more than a few days, a month at most Build the ship interior according to how close to civilistation it will be. Escort ships will have some of the lowest, while long range explorers some of the highest interior spaces for crew amenities.
Therefore the RP space is then transferred to Hubs and Stations for crew to wind down after a few days at the helm. Hell, Even in Elite: Dangerous the ships you fly have very little interior and are mostly Power unit, shields, FTL, etc...
...rant over...