This is just a hypothesis that came to me as I read this: most people find the QL17 to have a very sharp, capable lens. Yet, there are some (rare but present) who say they never got sharp images from theirs. Does anyone think that this wobble could be a culprit? It is absent from mine, and I find it to be razor sharp (as most reports suggest) - but perhaps this wobble is the culprit in an issue that many attribute to the mass production and variations among various production runs of this camera, now that they're older and many have seen a lot of use.
I think I am going to go to bed now - this is my second post tonight, and a second one that wondered off topic... Sorry about that -best of luck with gettting rid of your wobble
Peter.