Why on earth would "lighter on the helm" attract anyone on a long haul?
I remember 27 days with a long keel and heavy helm.
An heavy helm does only mean that the boat is not well balanced. Some full keel boats have an heavy helm even with a rightly balanced sails.
A boat with a light helm does not mean that it has an inferior tracking ability or that it stays less on its course, just that you need to make less force to maintain or alter course and therefore will require less energy from the autopilot.
If you have the sails balanced (as any good sailor would have) on a well designed boat, as most on these days, you can let go the wheel and the boat will continue happily its course.