Just one opinion from someone who stopped racing because of the windward-leeward courses.
Multihulls are made to have the most fun while reaching. Not designing a course to enjoy the boats' reason for being is kinda nutty. Maybe there is too much emphasis on including use of spinnakers. I like the old cat sailors' definition of a spinnaker: a sail for occupying a lot of time while going very slowly (hence, the use of the "B" mark and no self respecting cats had spinnakers.)
So, I stopped racing my last cat years ago when the catamaran courses started looking exactly like the monohull courses. We had these little Ferraris in the water but we were racing on courses suited to lumbering Cadillacs. It didn't, it doesn't, make much sense but because of that the spinnakers became prevalent.
I think it killed a lot of the speed thrill when the reaching died. It was like eliminating the long straight in front of the grandstand in a Forumula 1 race.
Does making a course that says, "this course does not include the fastest point of sail for the boat" make sense?