As stated in the other thread, it could work, at minimum, but I'd definitely recommend an upgrade, as ball pythons do benefit from being allowed to stretch out. With a taller setup you could also give them opportunities to climb a little bit, and that's always a plus. Having both length and some height for your snake is a good idea. SDA's recommendation of a 4x2 is a good one, and in all honesty, don't we want to provide the best for our animals, not the minimum?
As a side note, those hot side temps seem a little high, how are you measuring them? Are those surface temperatures or air temperatures? Are you using a digital or analogue thermometer?