Or your could add the Hellwig anti-sway bar or Deavers leaf spring set up and be happy with your 2018...
Don't really hear a lot of complaints from 2017/2018 owners about road handling...sure the new suspension is better, no doubt, but really how bad is the current suspension?
You havent looked hard enough. The ass end likes to step out above 70mph when it goes over expansion joints in the road.