That is an enormous enclosure for a ball python of that size. With that being said you are going to get different opinions from different people. I would also say that the behavior sounds somewhat normal for the species. As long as she is eating I wouldn't be too worried. IF she stops eating I would fill that thing up with clutter because like I said before, it is a big enclosure for anything other than a big adult female. For a comparison, we don't move hatchlings into a 5040 series tub until around 400 grams. Even then, some of them stop eating and have to go back or need a hide.