Yes, I feel the critical cam should be expanded, if not in terms of customizability then at least to work for both ranged and melee critical hits. And also they could make the final enemy defeated in a battle trigger the cam effect too, to mark the conclusion of an engagement in an epic way.

Also would be nice if skillchecks could get a sort of a special effect for rolling natural 20 or failing with a natural 1, since they're considered as critical rolls too.