Kingy,

as discussed previously, first the mast needs to be sorted (consensus is current mast will not support a modern looking square top efficently). No point in making a sail when you don't know what mast it will be used on.

But my personal opinion is that the current rig is so efficent across a broad spectrum of conditions that it would take years to get a square top to work as well, never mind better across the range of conditions.

If anybody is committed enough to make it happen, all power to them.

To give an idea of commitment shown in the past. The development of the spinnaker for the Mossie, started with trial of furling gennakers (didn't work) and then spinnakers. At least 3 spinnakers where trialed before settling on what we have today and it took place over about 3 years. Tim did most of this out of his own pocket. I'm sorry but I think this is the sort of commitment that would be neccessary to see another change in what is a succesful competitive class, for me personaly I think "if it aint broke don't fix it".