Well to be fair the squadron rules are pretty bad to begin with. Why would a shot that cannot damage one ship go to the next ship that it can damage? What did they see the shot wasnt going to damage the ship so they swung the guns mid salvo? That just doesnt make sense. They should only be able to target the closest ship unless using a leadership test.
I tend to picture that when firing one takes the whole squadron unter fire and not just the leading vessel. And if a salvo manages to crack through "light armour" it might not touch the ship in front, but the ships in the back. (In this case it is rather strange, that you can only hit the leading ship.)
I agree that squadron rules, as with some other BFG rules feel a bit awkward. But coming up with something entirely new isn't my intention here. I rather want to fit mixed squads into the existing rules.
If I'd want to get rid of all the BFG inconveniences I'd use another rule set, like Full Thrust. I'm certainly not willing to invent the wheel again. This is a hobby, not my life's work.