It is not to be expected that "handmade" means "asymmetric".
The pipe in question is not a super well shaped pipe, and I suspect it's because it didn't fit on the lathe, so it was put into round on a sanding belt, and held in Ian's hand in doing so. I think he'd say it's not his best piece. It's also a pipe that retailed for quite a bit less than his best pieces would.
I think if you buy a Rad Davis, you'll find (if it's supposed to be a symmetric shape) that the symmetry is very good. Same with Mark Tinsky. But a 500 dollar pipe is going to get more care and attention than a 150 dollar pipe out of anyone. If, for example, Rad produces a more symmetric pipe, it's also because he is not selling ANY pipes for 150 dollars.
I bought a grade 5 Savinelli Autograph a month ago. It's not especially symmetric. It's a diamond shank, and the airway is nothing like parallel to the "spine" on the shank. But I also knew that I was buying an eccentric Italian pipe. Myself, in building that particular pipe, I would have done it more symmetrically, because that's the way I work, that's the style I'm after. But again, I'm not selling anything that would retail for 165 bucks.
I guess the point I'm trying to make is that no pipe is "perfect". This pipe is off in terms of bowl shaping, but that only makes it "wrong" if you are comparing it to a pipe that was cut on a rotating machine. If you are comparing it to other "hand shaped" pipes, you'll find that while it's not maybe a "best of breed" it's a fair representation of what you'll get at that price point.
I'll bet it smokes great and I'll bet the stem is very comfortable. Lots of guys see the eccentricity as "proof" that it's a one-of-a-kind piece and not just one stummel grabbed out of the box of 10,000 identical to it. Others would say that it's just a poorly shaped pipe and that's all there is to it. So be it.