Yep, I had to rebuild our suspension after very few miles... As I opined before, it's a shame the industry took major steps backwards giving Lippert a monopoly on frames where they did the absolute minimum to hang a suspension from them but there used to be excellent setups before that (thinking like Open Range when it was independent). We all know better is out there with MORryde the most well-known in the RVing circle, but fact of the matter is better suspension tech and components have been around a long time.
Our S-Class now has MORryde CRE3000, HD shackle kit and X-factors at all 3 positions, disc brakes, and shocks. Custom springs with bushings in the eyes are going to be made for me later this year by the spring shop I use for my hot rods.
I have north of 120K on my enclosed vehicle hauler and I have done nothing but standard maintenance to that suspension, but had to rebuild our 5er after just a few thousand miles... It's not GD either. I rebuilt a Jayco Pinnacle's suspension of the same reasons (and worse, Lippert axles) and will be doing the same on friends' Forest River next month.