Ok this one will be quicker/shorter
The ability to update on a "per plugin" on all sites would be awesome.
Example : If I know "askimitet and WP Smush" won't "break" any of my sites and is ready for WP Vx.x, i simply select those two plugins & say update on all sites. Then the need for the clicking individual updates on each and every site is a bit less
Maybe even adding the ability to auto update certain "trusted and approved" plugins