Alright results are in! I've re-run all my editing based adherence related prompts through Nano Banana Pro. NB Pro managed to successfully pass SHRDLU, the M&M Van Halen test (as verified independently by Simon), and the Scorpio street test - all of which the original NB failed.
If you just want to see how NB and NB Pro compare against each other:
https://genai-showdown.specr.net/image-editing?models=nb,nbp