? much help will 3/4 ton make for ride quality comp to 1/2?

With a VPP style hitch you won't feel the winds until they hit the TV. ProPride is the better choice. I have a Hensley.

It should also be said that a lead sprung trailer needs both shock absorbers and improved equalizers for best performance. An increase in wheel travel and better spring control also dampens (lessens) adverse wind force problems.