A big part of moving the trap line aft is to keep your weight aft more of the time. You don't want to gybe and have to go forward in big waves to get to your trap. The same holds true for the crew's trap. That is why it is moved aft to the "old" skippers location. Also, since most of the Worrell boats run more rake than you would run around the buoys, it does make it a little easier to stay aft, BUT you still need chicken lines and foot straps to stay in place not if, but when you stuff it.
During one leg of the Worrell, we were doing ~18-20 mph single trapped. We went down into a large wave (probably ~2ft bigger than most everything else we saw that day) and there was no way out. I was back behind the rear beam with both feet in straps w/o a chicken line....BIG mistake! The chicken line was too short for me to use and I wish I would have adjusted it. I ended up hugging the spin pole... the bows recovered, but w/o the weight on the wire, be went over.