I wonder a couple things about craw crankbaits:
I don't see many painted in accurate "match the hatch" molting stages; hard shell, peeler, mushy and leather back.
The patterns reverse the direction a crawdad normally "scoots".
A bass would almost always "hit" the claws and head first then turn it before ingesting.
If the reversed pattern seems to work the best, why not add a bit of weight near the bait's rear eye so it would settle like a real craw, tail first, claws up in a defensive mode.
Seems a guy could use a 2.5 body and paint it similar to a Koppers. I've attached close to what most older crawfish look like in our rivers, ponds and lakes in Iowa if it were in an aquarium. It would be a bit darker in its natural habitat.
I've just begun to look at crankbait designing and DIY methods so just curious.