You managed to pick out a post I made 9 months ago for a comment? The state of the operating system has changed quite a bit from that time.
Nine months ago connected standby was not working the way it should and I was getting no battery drain while completely turned off. I had to totally shut down overnight back then because Sleep/Hibernate didn't work at all.
Since the June 20th update Sleep/Hibernate is working like it should and connected standby is working like it should. I no longer totally shut down and Sleep/Hibernate is now reliable. There is a small battery drain while sleeping, just as there should be during connected standby. At this point in time I can easily get through a work day when away from my office and on battery.
I'm sorry you are having problems. Being an early adopter, from the day the Surface Book was first released, I've gone through the same frustrations as everyone else. Today my Surface Book is finally working the way it should have when I first got it.
No, I don't work for Microsoft.
As was stated in the question asked in November of 2015, the issue is power drain when the computer is off, not while in stand-by. I'm sure you're a nice guy Gary, but the information you've added is irrelevant.