Some great advice echoing what I would say: if you're happy with it, keep it. Unless you're planning a Moab or Rubicon trip anytime soon I don't see the point outside of aesthetics. I have mods simply for aesthetics.. I guess it just depends on your disposable income.

Per the thread topic: I am extremely happy with my Dobinson's suspension including Dobinson's UCAs. I don't have KDSS, and the handling/control now is SO much better than stock, especially with the UCAs. To me, it was night and day difference. I feel safer driving the vehicle on the highway now, and the off-road capability has helped in some of the places I have explored. My only real gripe is the random clunking/knocking up front when the vehicle is cold and I reverse out of a spot. I've installed new sway bar end links and Durobumps with no change. I've been told that's just life with a modified suspension.. and the very capable install shop I go to have confirmed there are no mechanical issues to blame. Who knows.