I recently bought a 2003 Itasca, and it is literally rust free underneath... after 18 years!
Something definitely seems to have changed, and not for the better! I agree with your comments... I would also suggest getting on a creeper and try to determine (take lots of photos, they have a time stamp on them and do wonders for proving a case) whether the rust is "everywhere" or limited to the chassis builder or the coach builder's area of responsibility. What you are showing, would seem to be the coach builder's responsibility.

When I saw the year of your coach, I almost spewed my coffee! I recently bought a 2003 Itasca, and it is literally rust free underneath... after 18 years!
Something definitely seems to have changed, and not for the better! I agree with your comments... I would also suggest getting on a creeper and try to determine (take lots of photos, they have a time stamp on them and do wonders for proving a case) whether the rust is "everywhere" or limited to the chassis builder or the coach builder's area of responsibility. What you are showing, would seem to be the coach builder's responsibility.