The vibration isn't an issue to start with. Honestly, if it wasn't for this website I wouldn't even recognised it as an issue.
Well as the OP states, he put issue in quotation marks as it clearly is not an issue for some people, like you, but is an issue for others, who like me, have returned it for this reason. Yes, you can put up with it, and other people even like the vibrations caused by the speaker, but I can tell you with other apple products, even as thin as this does not have anywhere near the vibration "issue" as the iPad Air 2. I tried the Air 1 in store, my iPad mini 2, my iPhone 6 and the iPhone 6 plus in store; none of them vibrated the extent of the iPad Air 2, which noticeably vibrates even at 2 bars of volume.
Also, why should people who don't like this speaker vibration put up with it and not voice their concerns; they like other iPad Air 2 owners have paid a lot of money for a product, where the user experience is noticeably affected by a problem Apple and some of the major reviewers do not acknowledge. I would have kept mine, but for this "issue" because i am willing to wait for to see if Apple will fix or significantly reduce this speaker sound vibrations in the iPad Air 3. If people who don't like it keep it they are just condoning this "issue" and apple will have no reason to fix this.
You can also visit this
thread which stretches to 44 pages to see that a lot of other people also have an "issue" with it.
Will the air 3 fix the distortion issues??? That's a far better question!
For me this isn't a problem; just don't hold your iPad Air 2 too tightly to cause the screen distorsion. Either that or start a new thread where you can share your complaint and maybe someone else can dismiss it as not even being an issue.