Yeah, my heat pad didn't really do much for my enclosure. While I had it I had the area it covered on paper towels only; the rest of the enclosure got regular substrate. I didn't really like it though, both for aesthetic reaons and just for practical reasons. The heat pad wasn't raising ambient temps, simple as that. I ended up modding my tub for a CHE with a UVB light, which provides a day cycle and a basking spot beneath the CHE. If you're interested, I followed this guide.
https://rainbowsnakes.tumblr.com/pos...ial-part-three
The link goes to part 3, which has the links for part 1 & 2. It's really easy to do provided you're willing to get the proper materials and put in the time to dial in your temps (which you'd be doing in a bare-bones setup anyways).
Also, your enclosure is stunning! I'm loving that climbing vine and the plants everywhere! Your to-be BP will love being able to move around while feeling secure in that. Good stuff. Thumbs up.
EDIT: ALSO noted that you could simply mod it for the CHE part and skip out on the light part if you like. I just enjoy giving that extra enrichment.