What? A FAS isn't a good ship because of shields. It's because it's hull is amazing. So SCBs aren't really that useful. In fact it could be argued a shield isn't that useful on a FAS.
Which highlights a salient point. If people don't really understand the strengths of any one ship they want to impact, they're probably not in the best place to advise on it. No offence.
Frankly I much prefer FDs approach. Which at last mention was increasing the risk of damage/ upping the heat factor. That naturally governs how much each ship can use; this creates a much better risk/ reward offering.
And nerfing something to increase options? No. No one ever asks for a nerf to increase options. It's asked because the person doesn't like a mechanic, at all, or doesn't understand it, and wants it gone.
Changing the slot count reduces flexibility. Putting into a different slot class reduces flexibility. That's the point I am making. forcing constraints, naturally reduces flexibility.
Changing the dynamic. That's a whole different ball game. Changing
how SCBs work would be a far more beneficial change.