I'm not sure if the furniture in my old (2014) Jay Flight is similar to what you're dealing with, but I can tell you all of the problems you mentioned are indeed problems.
It was kind of sticky when it was hot, it was kind of cold when it was cold, but it changed temperatures quickly, so it rarely bothered me.
My dog scratched a bunch of it with his claws, but I think that would've been a problem with just about anything but the best fabrics. He tried to "dig a nest" on the dinette seat and did a number on the leatherette insert on the cushions.
My biggest problem, and one you will find sprinkled all over the internet if you look for it, is that the "leather" coating on the fabric began peeling and flaking off after only a little over 3 years. By the time I sold the trailer (less than half way through the fifth year of ownership), it was a total nightmare; the material was sloughing off in chunks as big as your hand. When I traded in the trailer, it was a known issue that the salesman said he sees all the time. I probably should have looked for some remuneration from Jayco or the furniture manufacturer. If I had kept that trailer, I would have replaced the couch (the main problem piece) with recliners, so I never pursued it.
-2018 Greyhawk 29MV
-2020 Jeep Wrangler Unlimited (JLU) (Primary Toad)
-1994 Jeep Wrangler YJ (Secondary Toad)
-2014 Jay Flight 28BHBE & Ram 2500 6.4L CC 4x4 (sold)