I’m gonna bite on the double XLASB fit sleipnirs, because they have some fairly seriously drawbacks.
Generally you aren’t fitting 220s or 425s on a double XLASB; you fit 180s because that is what you’ve got PG/CPU for. Damage is acceptable, but not really overbearing. 180s have got the optimal of blasters, so negating your dps by pulling range isn’t that hard for an enemy gang.
Second, if you want decent resists, you aren’t going to be fitting tackle beyond a scram. Lack of a web means it is going to be trivial for an enemy gang with even a quarter clue to pull range on you (lack of a web is the other reason the 2x XLASB fits use 180s, since they can actually hit orbiting frigates).
The tank isn’t infinite, it lasts as long as you have boosters, and you have to be careful to stagger reload properly or you pop. In addition, since you aren’t enhancing your EHP with a shield extender, you are still vulnerable to getting alphad off the grid.
The sleip does not have a strong capacitor; neuting will shut down any invulnerability fields and any neuts the sleip might have fit to increase its effectiveness against frigates.
A 2x XLASB fit sleip is strong, but it has its drawbacks and can be dealt with fairly easily. I don’t think it needs to be nerfed; it would be more acceptable for the abso, NH, and vulture to get buffed a bit.
I still think CS should retain the projection bonus the T1 BC hulls get.