Microsoft especially needs to do two things:
1) respect the DHCP settings that tethered devices provide (Android provides option 43/ANDROID_METERED) and NOT suck every data plan dry when on the road (maybe would be worth to expose an API to applications "the primary internet connection is metered, do not suck dry", given how huge any kind of update is these day)
2) give users the fucking option to only subscribe for security updates and not for the latest "feature" set. I know many people who disabled Windows 7 auto-updates after every other month MS would re-enable the W10 update nagware screen. This is way beyond hostile behavior, not even Apple goes this low. I went Apple once Win8 was coming out, definitely not going back until MS either gets a grip or makes W10 LTSB (the one on a "stable" track e.g. for embedded devices, without nagware, ads or other bullshit) available for general sale.
oh, and 3) provide a Windows 7 Service Pack 3 and installation media with all the updates preinstalled. Having to either upgrade by hand or mess around with ISOs is not exactly customer friendly.