Thank YOU!
Finally someone besides me that's using some common sense and being honest. When these first came out, Apple has quite a few complaints about the edge. To the cult like Apple clan, anyone that says anything that questions what Apple does is to be attacked or at the least put down in the forum. This is a perfect example of a small yet significant issue that could be so easily resolved if Apple did in fact care about the customer experience. I hate the sharp edge, but because I upgrade to a new MBP at every release, I choose to live with it.
If one is going to attempt to smooth it through any method, my concern would be having it come out as an uneven line or appearance on that edge. Unless something is used to control the exact amount of depth and material removed from end to end, the edge will be uneven. Even the slightest variation may be very noticeable. If that doesn't bother you, then fine. But awareness prior to making a choice is everything.
Having done quite a bit of edge softening on wood, this is my observation: the key is to go slow and use multiple passes. Randomness is my friend here I think. Think about it, if it takes 100 strokes to achieve what I want to do, and do a good job applying those strokes, they will spread out pretty evenly. That is why it is often easier to evenly soften the edge of hardwood than softwood. I have a friend who is a professional cabinet maker. He build really high end stuffs. He doesn't like big radius on tables and desks. Often he just softened the edges with a piece of sand paper by hand. His creations are so precise and exact.