IF ISAF likes the 16 foot format for mixed multihull then ISAF will write a set of class rules that defines the Olympic Class. It's very likely, that they will spec out rules like the OD Tornado class. (The T class had to capitulate to what ISAF wanted at the time in their attempt to remain Olympic) The T class OD rules or an even tighter SMOD are probably what you are looking at going forward.) They won't have to set a crew weight minimum... by fixing the sail design to basically SMOD ... the crew weights will be automatically set.
Provided that the ISAF specifies a sail plan large enough to merit an optimized crew weight of 310 lbs, yes? If that is the case, why stir the pot in the first place?
As noted earlier, weight is an issue for all beach cats at the extremes. We even had an ARC-22 race single handed in light winds and beat the pants off of everyone, corrected just this last month. Frankly, racing in 5 kts is BS anyway and you are going to be hardpress to find any beachcat where crew weight is not an issue in those winds.
