Again, I'm talking about going through earlier photos of me (toddler, stuff I've found from about 10yo) - I didn't have this at all. The teeth themselves might not have been perfect, as many before they go through orthodontics, but the midline shift wasn't there and I didn't have the (however subtle) underbite I've ended up with. Regarding the molars - well, as far as I know, they don't come out well or at all for most people, but I think mine have already broken out of the gums by the age of 15, so I don't know whether they've caused some problem with their (at least some of them) tipping over the rest of the teeth while I was still in my growth phase. When I went through the orthodontics, he first used this "palatal expander", but that was only for the maxilla (I don't know if that's possible, but as the doctors from my surgery decided I rather had a retrusive maxilla, I wonder whether the expansion have caused a widening but also a shortening of the maxilla?).
And regarding the TMJ - I actually just received the diagnosis of the laboratory I had my CT taken at, and it probably sheds some light, but I'm not sure of everything's meaning (translated from Hebrew): it says "There is a substantial narrowing of the TMJs, more at the left" (the side I suffer from clicks and poppings at), "Erosive changes are shown at the left mandibular condyle", "Right mandibular condyle is shown normal", "The glenoid fossa is shown intact", "The ramus mandibula and the mandibular canal are shown with no unusual findings".