I admit that I'm no fan of non metallic interfacing with bike components, carbon drop outs might not accept the level of QR tightening that a good enclosed in cap cam design can produce. The QR's that use a plastic cam bearing surface are well known for their lesser clamping forces. QR's with steel serrated end caps (and axles with same) can hold onto the drop out better then smooth faced or AL parts will.

But to answer the OP. Adding a "drop" of epoxy on the drop out slot's inner surface to nudge the axle just so isn't hard to do and is reversible if ever needed. Using a couple of pieces of masking tape on either drop out face will hold the curing epoxy in place, like two dams on either side of the slot. A med cut 3/8" round file does a quick job of the final shaping of the epoxy and the needed fit for the axle end. Andy