We also had an issue with a tire on our 2015, but our dealer took care of it. In the Ford booklet that came with our coach there was a tire warranty booklet from Goodyear.
Over all my wife and I looked at about every coach in this price range. To me all of them had the same level of quality, fit and finish. Some used little tricks here and there, but when it all came down we picked the FR3 because it had what we wanted, mainly a King Bed that was 80 inches long. As we have put the miles on it, little things have come up and I fix them so the end result is very few rattles, and many little improvements that make it so much more enjoyable. Still a long way to go, but Forest River has been most wonderful to help and advise when asked.
If you read all the forums, even on the 300K models, you will note, people that are unhappy about this or that. Like was said, people find it easier to complain than compliment.