ARMOR STACKING - SW does not allow for stacking, but reality does... within reason. Two layers only, the inner layer must be flexible, and the lesser layer only gives half the usual bonuses. This will allow people to wear an inner "ballistic body stocking" and then throw on hardshell when necessary, without upending the balance of things.
BUSINESS RULES - The house rules created by Bobby Dean will work nicely at the level of resolution we need.
EDGES AND HINDRANCES - The various edges and hindrances compiled for the "Chicago Sprawl/CARMA" campaign are appropriate for a Firefly campaign as well.