Received them yesterday. Was suspicious of them and spent some time on the net trying to assess if malicious or not. Installed in the end and so far not experienced any difference. Strange that there's zero info out there about these, and the dates in the updates are from months ago.
Id view that as a long overdue normal update delayed by all the SP4 & Windows 10 problems. This would normally come out after 3-6 months. I still hear people with Touchscreen issues requiring a reboot to return the touchscreen to functional status etc. over a year after initial reports of the problem. IMO many of the SP4 issues are/were related to Skylake stability problems although some are Windows issues... the touchscreen issue is probably Windows.
Back to battery while sleeping... there were major changes to power management introduced with Skylake. We can only hope much was learned and improved in Kaby Lake and Windows 10 and by the time CannonLake and Windows 10 3rd try rolls out in late 17 maybe the third iteration will be the good one. ;-)