Although thye sound like a good idea, I would worry about putting lines on the thwart, if only because I seem to spend so long sitting on it. Especially in light airs and downwind I prefer to get as far forward as possible to lift the transom so it is not “digging in”. Usually end up on the thwart, as far forward as I can get with an outstretched arm on the filler extension …
My preference is 3 cleats on the back of the thwart taken to a triple block to turn the lines along the centreboard case. The dont get in the way and the lines are easily held clear if slacked off to make room for sleeping, if so deisred.