I agree with most of what you said we loved our first Jayco. Second one not so happy.
Many similar issues as other reviews elsewhere have stated. Jayco would not back up the warranty for their reasons in which I disagree. Trailer brand new 2018 with mold issues. This being the major issue.
Purchased late in 2017 we had these issues in august, 2018. Jayco claimed we did not maintain roof seals and would not warranty the problem. Maintain roof seals ! in the first summer of use.
The similar issues others had with the Jay flight 28 RLS.
Miss aligned doors, water leaks under the sink, furnace problems ,air conditioner connection issues, poorly supported bed frame .I have a cracked window frame they put 4 rivets in around the crack and some *** (brand new) Front electric jack works when it wants. Some of us do have realistic issues.
User's recommendation: pay great detail when purchasing to everything in the unit and read consumer reports.