If you've read this entire thread you're aware of the level of research and scrutiny I've done with this trailer. Another issue came up after we returned with the trailer which has since been resolved locally but in the process, I've managed to speak to at least five different people at all levels of Keystone including a line production manager. I don't know what year Denoel's trailer is but there are absolutely improvements in the construction design from year to year especially if you're comparing say a 2008 to a 2011. The guy I spoke with, Rick, said they were aware of the garage floor concerns. It seems pretty clear to me they take feedback from customers seriously and make adjustments year to year.
I've been riding a lot longer than RVing. When I hear tires going bad so soon and an inference to overheating, I go right to proper inflation. Perhaps it's my inexperience with trailers but the hair stood up on the back of my neck when someone reference putting light truck tires on a trailer. There is a huge difference in sidewall flexibility and strength between the two. An LT tire in tight manuveuvers could pop the bead. Maybe there's something I don't know?? Always open to real, on the road, experiences.