There were two main issues with WW Superlite models
1)Weak tongues on bumper pulls that caused bending. I can't remember the exact years affected but WW did go to hearvier gaugue steel at one point to address. Not an issue for a 5er.
2) Sagging walls/outriggers. Either bumper pull or 5er can be affected by this. Easiest way to tell if a unit has sagging walls it to inspect the wheel weels on the inside of the trailer. If they are square and level against the wall you are OK, if they appear to be leaning outwards and developing gaps from the wall then the outriggers/walls have began to sag.
2015 Attitude 28SAG w/slide
2012 GMC 2500HD SLT Duramax
B&W Turnover w/Andersen Ultimate 5er hitch