Updates Manager / Notification Manager / Auto-Update Disabling plugin: Yes, there is a need for that, because clickyclickyclick-happy clients who JUST LOVE 
to install updates without giving it any further thoughts 
What I’ve tested so far and can report as “working”:
- Easy Updates Manager - has some nasty nag screen for its “suggested” plugins included, with a 6-month / 12 month dismissal option, but aside of that, its working flawlessly. Also works (so far) on Muiltisite
- Webcraftic Updates Manager - works decent, too, but leaves out too many notices; but its base functionality, ie. disabling / enabling auto-updates globally or individually per item, is working as expected; Multisite: Its suggested to use Multisite Plugin Manager to individually enable or disable the plugin per site
cu, w0lf.