Hi Sparky,
The jury is still out on your canted hull position. There is some advantage in having the daggerboard and rudder not in the vertical plane sailing to windward and flying a hull. When the daggerboard and rudder are perpendicular to the main beams and the boat is flying a hull, the foils in the water are generating side force and a lift force. This lift makes the hull float higher out of the water and reduces the hull wetted area. If the board is vertical when the boat is flying a hull, there is no lift force from the board. The tilted sail plan, hull flying, produces side force and forward force and "down force". There is no centerboard upward force to counter the sail down force with canted hulls.
What really needs to be done is a test. Put a boat together with a canted hull on one side and an uncanted hull on the other side. Use a GPS to record boat speed and direction data. Sail on both tacks, upwind, downwind and in different wind strengths. Repeat the test several times. Analyse the data and then we know for sure if there is a benefit to canted hulls like you describe.
Also there is this argument: If there is a benefit to canted hulls with hull flying, then there is a penality to sailing a canted hull boat when not flying the hull. In a race if you fly the hull to windward and sail with both hulls in the water downwind, what is the gain, loss? We need a test!
Foil aspect ratio in an areo text book is span divided by average chord. On a centerboard or rudder this means depth below the hull divided by average width. Higher aspect foils are said to be more efficient. A better term is higher aspect ratio foils have a higher lift to drag ratio than lower aspect ratio foils. WHY??? In the equation for calculating induced drag, drag due to generating lift, the foil's aspect ratio is in the denominator of the equation. Therefore as aspect ratio goes up, induced drag goes down. What is the disadvantage to higher aspect ratio foils? The bending moment is higher in the longer foil, the higher aspect ratio foil. Therefore it must be built with stronger materials like carbon and this makes them more expensive. So again, higher performance costs more.
Bill