GypsyComet
SOC-14 1K
I'm honestly not sure what the whole percentage-batteries-bearing business is: if they're saying a dreadnought can dodge and wiggle around as it likes and still bring the spinal to bear when the time comes, how hard is it to turn on one's axis and put everything on target(s)? And who says the targets are all standing over there like some re-enactment of the Battle of Jutland?
It isn't that they are all "standing over there", it means that any single target in any given bearing can only be shot at by a portion of the batteries on a large ship. The "Spinals always bear" rule is just making sure that regardless of what else is going on, if something is getting shot at the spinal is involved.
Remember, CT High Guard is an abstract fleet conflict sim, not rocket science.