I have never thought that the problem with "righting" a capsized cat was the problem of the cat, but more so with the experience and knowledge of the crew! IF proper, simple, accurate, training/instruction is imparted to a crew before they sail then righting SHOULD never be a problem! There have been courses conducted here for over 35 years on how to right a capsized cat. If a cat has a mast length over a certain length, it is impossible for the crew of that boat to right it with just their own weight, the leverage of the mast exerts just too much "load" for them to counteract, BUT if there is enough wind to "blow" them over, then there is enough wind to "sail" them up right, if they are aware of how to use it. When a crew knows that they are ditching or have ditched their only concern, in the first instance, is to get themselves onto the hull in the water ASAP. forget all else. They then can, by holding onto the dolphin striker or righting rope (and every cat should have a righting rope under pain of death if they dont - no pun intended-), lean their weight out board. By just leaning a little beyond the vertical they will keep the boat in the 90 degree position indefinately and stop a 180 degree roll over. Then if the crew, holding the righting rope and letting out appropriate amounts to maintain their "just off vertical" stance, moves forward on the hull as far as they can (preferably at least to the forestay bridle point, they will depress the bow of the cat deeper into the water, (as a consequence the transom will lift quite considerably). The hull will then have much more resistance to the sides way movement created by the wind at the bow and conversly the stern will have little resistance to that same force. The result is that the stern will move off wind and the bow will move up to, and point into the wind. With the hull pointing into the wind the air flow over the sail/s and mast (the mast of course being only partially in the water as the mast step position is in the centre of the boat ) will generate enough lift to pick up the mast and sails and the boat will come to rest in an upright position facing head to wind and relatively stationary.
This is the method that has been taught to probably thousands of cat sailors here over many years and as a result there has never been a catamaran, racing fatality, due to ditching in that time.