I have a 195BH and my axle was bent the day I biked it up. I was assured it would be no issue to get the axle replaced. That was almost 6 months ago and I am suppose to pick up the trailer tomorrow. I will see how that works out.
Anyway, the wear on the inside does not surprise me. My tire was leaning in at the top which is what makes the inside of the tire wear. I am sure that better tires may not show as much wear as the cheap ones do, but regardless a tire should not go down the road with the top of the tire leaning in. So, I suggest you check your axle to see if you might have one that is an issue. I have over 1,000 miles on my tires and I can't tell that there is any wear, but I am sure over some more miles it would start showing up. If it was not something that I had to put so much mental and emotional effort into I would push that the dealer replace my tires too. But, I think my dealer makes it so you never want to bring your trailer in for warranty work. I will post about that once I have my trailer back in my hands.
2016 Wildwood 195BH
2009 Silverado 1500