I agree that delamination is an unfortunate issue, but the way you describe it is not accurate. The roof membrane is not what seals the roof. The roof is already waterproof before the membrane goes on. It is simply a UV inhibitor for the roof. If you've had leaks it is because of some other fault in the system. For all new buyers, that membrane system has been eliminated.
There is no way you are going to get the manufacturer to "address" issues that others may have had, on your trailer, when there was no failure on your trailer. Wheel bearings are a good example of that. Wheel bearings are a normal maintenance issue that is best done soon after purchase, and after that, every twelve months or twelve thousand miles as recommended by Dexter axle. After the first couple of services, that period can be extended if everything looks good.
If I looked hard enough and wanted to bad enough I could find a long list of things I wish were better. But that's not what I'm interested in. I bought it to use. And that is what I'm doing. It is durable, efficient, easy to tow, comfortable, just the right size, and very capable in winter. I'll do a lot of upgrades to make it better. Better for me. I just got out of a Black Series that had far more issues than this one, and a factory that was rude, arrogant and difficult to deal with. Before that I had an Oliver which is arguably the best trailer made and backed up by an outstanding company. That one had design flaws too.
Trailers are made to be used. They are not made as well as we'd like in many cases. But if you only focus on any problem you can find, and invent a few along the way, and expect the factory to do whatever you think they should, you will never get any enjoyment out of the whole experience. You probably made a mistake by buying it in the first place.
Some have said they want a trailer with a good resale value. That cracks me up. Resale? On a trailer? I will never buy a trailer to resell it. Buy it to use it. If you don't want to keep it, don't buy it. But having said that, I sold my last two trailers for more than I paid for them in this crazy market, and I bought both of them new.