So it was always at sea level could it be linked the the front foils some how so waves and wind bullets didnt effect it so much and nose dive
Who really cares H2o why are you wasting your precious time even thinking about it! Get your boat finished and go sailing!
That might make the boat more stable, but who wants to watch a race where no-one ever crashes? 
Ability to control the rake of the rudder foil during the race would be one way to increase stability. Not allowed by the rules though, so it's all a compromise, upwind, downwind, slow, fast.
Hobie did a trifoiler back in the 70's/80's. It had the controls you are talking about
Lot's of foiling dinghies have a little arm that auto adjusts main foil through chop, then a handy control built in to the tiller for the rudder foil
