In 4th/5th edition, Snap Shot didn't exist as a concept. You either could shoot, or you couldn't. A vehicle could normally move 6", and fire one weapon, period. However, it could fire any number of Defensive Weapons, such weapons being those that had a Strength rating equal to 6-or-less (or 4-or-less in 5th edition).
I propose the following:
-On a vehicle, weapons that have the "Assault" or "Rapid-Fire" type do not count against the number of weapons which may be fired at full BS.
-On a vehicle, weapons that have the "Salvo" type do not count against the number of weapons which may be fired at full BS, *if* the owning player fires them at reduced profile.
-Assault/Rapidfire weapons on vehicles, as well as Salvo weapons in their reduced profile may be all used for Overwatch.
The main beneficiaries would be Ork Battlewagons, Necron Ghost Arks to a lesser extent, any vehicle with Flamers, Chaos vehicles with combi-meltas, Lasplas Razorbacks, etc.
There's *one* notable "Breaker" that would also arise from this, being the Land Raider Crusader getting buffed harder (the Land Raiders could use recosting/reworking in general anyway). Other than that, are there any notable breakers that would come from this?