> This idea is just at the "napkin drawing" & mental exercise stage, but the idea is to eliminate the issues with soft wing sails

Soft wing wing sails are the future, and together with hard wings have been discussed here extensively.

Especially given the speeds boats of this ilk can achieve, where single panel sails begin to suffer in performance against the conformity of a wing. With the added benefit that the efficiency of the wing sail is such that area can be much reduced.