A couple of photos can help us figure out what's up. And something common like a soda can to guage the size and width of the snake as well.
Without seeing photos...to me, Soft and wobbly can be one of two things....
The snake may have been too tense with the occasional handling that you had before. The muscles held tight when out and about. Now even though it shies away, once out it may be more mellow and less alert.
Alternatively... and what seems a bit more likely given the timeline you gave, the snake has only eaten 5 times in 9 months? Sounds like the snake is now loosing weight from being underfed. The skin may be a bit looser without the muscle and fat that it had prior to last year.
Every snake is different with its habits. I would consider offering an appropriate sized meal every 7-14 days. Some may eat every week like clockwork. Others can be a little less consistent.
I'm glad the noodle is gonna be with you and that you are looking into improving the quality of life this one has!