Terrific explanation and serves as a good reminder it's easy to be complacent about complexities usually so stable they can be taken for granted.
I'm happy to report that since effecting the Power Down / Activation sequence, I've not had any reoccurring issues when awakening my MBP from Sleep, which over the last 48 hours has been initiated manually or effected by Energy Saver.
Thank you, joemikeb. Cheers.
