I don't know where you're seeing a lot of people with spring perch damage - not on this forum. We've had a few people with broken hanger brackets, but that's on newer builds than your 2011.
In August 2010, (2011 Model Year), Heartland began a transition from Lippert axles & suspension, to Dexter. The frames were and still are from Lippert.
If your 2011 spring perches are intact, you might move your attention to the shackle links and bushings. They are the parts that commonly wear out with usage, especially if you haven't added wet bolts in place of the original bolts.