Problem description:
Lots of Macs have Problems staying asleep, when you put them there (Like with a short press on the Power Button). If you google "mac wakes up from sleep by itself" you get 22 million results. I myself have 2 MacBooks Pro that have these Problems and wasted a lot of hours for finding the root cause.
Solution:
If the MacBook wakes, see if there is any activity from HID (Touchpad, Keyboard etc.) within one minute. If not, go to sleep again.
Benefit:
This would save lots of energy for the enviroment and my personal wallet 
I would gratify it with another donation to you of 40€.