Bummer sorry you are having endure such issues. I feel blessed that I have had zero minor to major problems. I would call what I have had to fix "just cleaning and tightening up what the factory line failed to do". I have the same model myself and it's the 2016.5 when that made so major changes. Do you know which one you have? It sounds that you may have one of the earlier 2016's that came off the line with issues like the axle recall.
So far we have been around 9 trips along with a lot of driveway camping with the wife to escape the kids
. I like to pull out the slides, awning, and use any other items that could fail. A 2 year warranty goes by fast and if you don't put some use into the trailer it may fail after the warranty cause you may only camp 3-6 times a year. What I hear from friends that are needing warranty work here in WA is the wait time can exceed 2 months before any work gets done. Also you have to leave the trailer with service dept. a buddy of mine can't camp all summer cause if a leak around the front cap. It's not a Jayco but it could happen to any of us.
Hope you can resolve any issues so you can get out there camping. You may have gotten a great but it sounds like the previous owners may have returned cause having a trailer with issues I'm sure can be a nightmare.
Take care