Good review, Lobster. I think it's good for everyone to realize this was one instrument. Some of the quality control issues mentioned probably could be found on other recently manufactured XT's. I don't have any experience with this most recent run of XT's after Gibson started production back up.
I don't think anybody here has reported neck stability problems, so maybe it was just the one you got.
I would like you (Lobster) to have a chance to review the earlier, Korean-made Spirits, particularly the XZ models. That's not really what you are doing with your headless reviews- you're looking a current off-the-shelf basses, but I think you'd enjoy the older ones more.
The Korean basses obviously share some of the design elements that you did not like, but they were excellent instruments at the original price points in the MusicYou era. I think quite a few of the owners who've posted in this thread either purchased them from MusicYo or have bought used ones. At the lower price points, it's more conceivable to upgrade the electronics and pickups, and to buy the string adapters.
The XT's are not for everyone. If one agrees with Ned's designs and ergonomic philosopies, some at least, you can see them as a terrific travel bass. A little EQ fixes the sound of many passive basses.