I personally still have teh line running to teh back beam also so I can't speak from experience. My mark roundings are relatively traffic free as I am Portsmouth racing against mostly monohulls. With teh douse line running to the back beam you would probably still end up with your body axis oriented slightly aft. Not having your head in a position to be watching forward could lead to issues at mark roundings. At teh least, you probably drop early, in recognition of all teh high-speed traffic and how you need your head up.

If you can be kneeling on teh tramp, hauling line like crazy and still have your peripheral vision watching port and starboard, would both be safer and allow you to drive closer to teh mark.