There's a whole industry that'll pay lip service to your "improved handling" and take your money.
Soon there will be people below this post testifying that the money they spent was well worth it. They bought steering stabilizers, shocks, air flow restrictors, better bushings and steering pivot things. (Forgot the name.)
All but a very few will swear it tightened things up and did NOT affect the smoothness of the ride.
I believe that there's a tradeoff between ride comfort and handling and that Freightliner found the sweet spot. It's a bus, it handles like a bus. Ever driven an 18 wheeler? That too does not handle like your Honda Accord. They too get sucked into other big rigs when passed. They too need to watch the crown in the road, and the edge of the road and uneven pavement and work it harder when it's windy. That's how they handle.
Me, I like the smooth ride and it handles just fine. Yes, sometimes you have to work it. That's what driving one of these requires. It's a skill. Practice helps, eventually it becomes second nature and you don't have to white knuckle it.
Having said all that, IFS does ride smooth AND handles better. Comes with a new coach too.
(Assuming you don't have it....)