The rocks were really really slippy a couple of weeks back and my walsh's were sliding all over the place - the mudroc 330's would have been better but they give my achilles grief.
Bit late in the day I know, but If you've got some superfeet try popping them in the 330's I've had no trouble with the shoes rubbing since I started using them. You do get a bit more heel lift, but I'd have that any day over the pain they used to give me