Only thing i would change is add another hide on the cool side. Ball pythons need 2 hides when in tanks. Tubs are a different story.

The lamp i would ditch to a heating pad. I bet your using the mulch to help with humidity. If you ditch the lamp youll not need the mulch at all. And upgrade to a digital hydrometer liek the Acurite ones form Wally world for $12.

other than that its a good start.