This is just word-salad, I'm afraid.
You want to place restrictions on what modules people can fit into slots and you're trying to sell it as "REMOVING the RESTRICTION" when you're actually intent on doing exactly the opposite.
You're not going to stop people from "griefing"others just because they can't load up a ship with HRPs, MRPs and SCBs.
What's more, I hate to break it to you but you're also not going to do any better at combat just because those ships aren't fitted with those modules.
If you're currently playing in Solo because you're worried your ship is going to get smoked in Open, it's probably for the best if you remain there because limiting the modules available to PvP ships isn't going to make much difference.
Aside from anything else, it's not usually the defensive capabilities of a ship that make it dangerous. It's the weapons.
Unless you want tonerf"remove the restriction" ([where is it]) from those as well, you're probably going to end up just as exploded.
Restrictions are good. It limmits extreme specialication. If we didn't have them, people would put five shield generators in a Cutter.
Several optional interal modules have a 'one per ship' limit. Moving HRPs, MRPs and SCBs to this category, would not hurt anyone. No one needs more than one, If no one else has more than one.
The same goes for utilities.
Limits like this would free up slots that pirates could use for cargo space, scanners and limpet controllers and still stay at max combat capability.
It would also reduce the TTK for meta builds, that is way to high at the moment.