In regards to the inability to disable automatic updates, that is only for Win 10 Home, other versions of Win 10 will still retain that ability. I personally view this as a good thing since the average user is better off installing all updates since, if they turn them off, they often do no updates which isn't a good thing.
I don't plan to upgrade any of my Win 7 or Win 8.1 machines to Win 10 either but, in my case, it's simply because there is nothing about Win 10 that is compelling enough to get me to make the switch. I don't care about a Start menu (especially the clunky one in Win 10), the Edge browser isn't nearly ready to compete with any other browsers out there, Cortana is a useless toy and I don't use Metro apps so don't care...