>Then they lay the piece together and shrink wrap very tightly. I have a feeling this process effects the way
>the slices meld together and makes it like peeling an onion as you're saying.
Yeah, I agree that's probably what's happening. I slice mine thin - then vacuum seal and freeze. I'm not careful about getting all of the pieces lined up so they get all smooshed together in a random arrangement. After opening it looks like one solid piece of fish, and you need to hunt around a bit to find the edges to peel away. But it won't peel apart in layers unless it's been sliced.
BTW, since my post back in March I made a few more batches. On those, I did remove the skin and got better results. I was also very careful to trim away all of the grey flesh as I don't like the strong flavor it has. Alas, I only have about 1lb left in the freezer :(