Possible solutions to balance SPGs and Autoloaders

Lert: Autoloaders don't need rebalancing, they're fine as is.   The artillery horse has been beaten to death, resurrected via black magic, beaten to death again, and then beaten some more. That said, your option 1 is ... not terrible. As long as there's a delay on it, like with 6th sense. It would have to be a trainable perk though, not one you get for free like the future actual 6th sense.