Mystere 4.3 class racing is relatively strong in Ohio at OCRA events. We have done some short "long distance" races lately (ten and twenty mile events) and have a good turnout in each OCRA regatta. We have several Mystere 4.3 class only events also. We have seen no interest in this area in any other type of 14 footer even though Hobie 14s are relatively easy and inexpensive to buy. Racing in general is continuing the long term downward trend. I see no evidence regionally or nationally of an F-14 class developing. Not meant to be a commentary, rather just a report based on your question; Truly wish the news was better.
Mike