Thanks for your responses, that's what the breeder thought as well and what I was hoping was the case.
We have a great exotic vet so I figured if anything deeper was going on, she'd be able to figure it out.
After examining him she said he's healthy but does have low muscle tone and is also *super chill* when she turns him at certain angles, moreso than he should be. I've already seen some muscle growth with regular handling so I'm going to keep giving him exercise. She doesn't suspect any degenerative neuro issues and his response to touch was great. On the ground he's great. Eating and being handled he can be a bit goofy.
I'm glad he's healthy, even if he became a snake with extra needs, I'd keep him around. He's a great eater and really unique looking.