Are you saying that that this much sail area isn't safe enough or that the boat will be so fast it will scare the kids away?
I would have thought that the point of a multihull is to go faster. It's true that a certain amount of speed may be intimidating to a youngster, even if it is quite safe, but of course you can fix that problem by just buying an Optimist. I'm not sure that making a multihull more like the Optimist is the right solution.
Correct, but that's why I said IF you want to compete with Optis. There has been a lot of discussion recently that we should have a soup-to-nuts training/development program for kids on cats. To do that, you can't scare away the six-year-olds (or more importantly, their parents).
There's nothing wrong with the design as proposed, so long as you're not trying to win over six-year-olds (and their parents' money and time). However, if we don't get them young, we may continue (forever) to lose them to the monoslug world.