My first morph Ball python is a Spider with slight wobble. I knew that spiders could wobble, but I'd never watched any videos showing it, or seen one in person. It was pretty hilarious to see him bobbing his head back and forth like crazy when we went to see/buy him. After getting settled into his new home, he wobbles a lot less, so it seems to be a stress-linked thing, at least for him.
Most of the time he's fine - until his nose bumps into a surface, and then his head bobs quickly from side to side. My boyfriend has nicknamed him "Gord Downey" after the singer in the Tragically Hip, who does a similar head bob. Lol
Anyway, I'm in the school of thought that if it doesn't impact their quality of life, then there is no problem. I am prepared for the possibility of having to euthanize hatchlings who are "trainwrecks" to the point of being unable to eat. It doesn't seem like it's terribly common to be that severe, though.