One design is good idea, but it just dosn't happen.

Here in Switzerland some folks sail firstclass 8 (one design), a monohull.

At the last german championships the teams coming over from France had to carry lead, while the boat of my friend was carrying 400 kg overweight, with no stuff inside.
The overweight came from storing the boat in the water (we guessed). The teams with a higher budget lifted there boats out of the water an stored them in a heated place.
Also the builder changed the **** layout of the new boats.

An other example, a friend of mine, was competing at this years european championship of topper boss (Skiff like 49er)at the lake of garda. He was sailing a older boat, but the new boats were completly different. they changed the gennackersize and shape (lufflength), gib size and had a taller mast. All one design ...
At least the wind was high enuogh, so the lack of sail area didn't matter that much.

good sailing
Andi