I agree Pimax needs to fix the edge distortion.
However, in person, it might not be as bad an issue as first appears. With continued use, distortions may indeed be "ignorable". I wear "progressive multifocal" glasses. At first the distortion is horrible, but after a few days, my brain adjusts and I can switch between pairs of glasses (with differing multifocal prescriptions) without issue. (My brain near-instantly adjusts to the very different visual input). Actually, the brain can even adjust to upside down images:
Here's a link: https://en.wikipedia.org/wiki/Neural_adaptation
Fun Fact: The image formed on your eye's retina is actually upside down, due to the eye's lens. Your brain inverts it, so you see the world normally. That means that the upside down glasses are actually "fixing" the eye's optics, so that the image is rightside up.
I do have 1 concern: If there is distortion, it's possible that Pimax's team might inadvertently adapt to it, so they might not even be able to see the issue after a while.