I'm planning on running a post-apocalyptic setting for my Savage Worlds campaign, and one thing I want to do is to make Wild Cards have less of an advantage over the average inhabitant of the world-they take more to kill, but basically they don't get as much of an edge-there's less mercy for them.
One thing I've considered doing is replacing the d6 Wild Die with a d4, to make things less powerful (I want to leave Acing in so that there's a chance of getting, say, 11 on the Wild Die, but you'll need to Ace twice to do so). However, will this create issues? Should I instead, say, limit the use of Wild Dice to a few select instances?
EDIT: When I say that I don't want the Wild Cards to have much of an advantage over an Extra, I more meant to say that I want to keep the distinction, but mess around with it to be more lethal in general-I'm okay with frequent and horrible failure, as it fits the feel of the game.