Since Snap Shot is now eliminated, what would I gain from aiming a weapon with ACC 0?
Without Snap Shot, you don’t need to Aim with the kinds of short-ranged weapons that have Acc 0. Just shoot right away. If you must aim, the first second of aiming lets you brace for +1, even if you have Acc 0. But when we wrote the rules, we assumed that most people wouldn’t bother to aim Acc 0 weapons, and that these weapons got relatively little out of aiming.