Sorry for your disappointment- Dual Sport and Adventure Riding means various things to everyone. One thing you can count on is that the bike should have a plate. Over and Over you will hear, husky and ktm "dualsports" are offroad race bikes with plates: detuned and EPA restrictions affecting the costs and challenge to run proper. I spent alot of time making my TE "dualsport" MORE offroad ready for me. My definition of "Offroad" is not the same as the guys in Cali or Florida- going to have different tire, and suspension settings. Just like my 'woods dual sport' set up TE will Blow through the stroke and bottom out on every decent jump- cause its set up for woods not MX.
But please don't ask for Husky dual sport bikes to become more street orientated. They are NOT street bikes.
Bikes that are less dirt orientated: KLR, DR, and yes the Terra are better on road but pigs in my woods. Its one of those things you can't have a bike that does "EVERYTHING" perfect- not in absolute terms.
That said... I am sure you could set up the 511 for anything, you just need to tune, gear, it for it. But Now its like the DRZ guys trying to turn there DRZ's into KTM/ Husky's whereas you are wanting to turn your 511 into a DRZ... in a sense. Take the skid plate off and add a 50 pound plate to the bottom- she'll smooth right out on the freeway.
Good luck, I hope you find your solution.