Imo, a shotgun / pistol will not allow you to fire a “judicious” direct shot at the desired part of the body when the enemy should actually prevent you from firing.
Using etermes video as an example.
Give Rapid Clearance diminishing returns - #69 by etermes
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Enemy on 2 tiles → FreeAim gets Double accuracy penalty
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Enemy on a diagonal tile, FreeAim gets Triple accuracy penalty
Add
In this case, speaking about the RC, each “received” AP should add a penalty on accuracy, which should be stacked.