Microsoft cant do any more work on this - you dont like the standby tomes, you either need an ipad or a windows on ARM machine. Intel chips consume a lot of power in sleep.
You lost 10% battery over what period of time?
Default hibernation is after 5 hours of sleep - did you change it?
Are you still in S mode?
Have you changed your sleep network settings to always disconnect from the network?
I`m seeing about 3% battery drain in 4 hours which is in line with what you should expect.