The temps and humidity she had before were indeed too low. You are right to have her temps set to the standard ball python numbers. I don't think you need to do anything about that, other than just letting her figure it out. The good thing about giving them a temperature gradient is that they can choose what they're most comfortable with. If she was really overheated, she would probably be trying to soak in her water bowl.
Also, that is a lot of food. I would really cut it down to one rat per week. They can get overweight just like any other animal, and digestion is a big process for their bodies. Take it easy on the food and she'll be fine. If she's not used to proper feeding schedules especially, it will be quite a chore to digest all that. Don't feel bad though, she will be fine eating a lot just this one time. Sounds like a good sign that she is an excellent eater!