I was thinking it would be great to have an option for each star to set it to “Manual Upgrades Only” or the like. Basically if you turned the option on, the star would not be able to be upgraded through Bulk Infrastructure Upgrades, Quick Upgrade, or the Galaxy window, it could only be upgraded from the star’s own info window. Perhaps the option could be enabled/disabled through the Quick Upgrade and Galaxy windows as well as from the star’s info window. It might be nice for some kind of visual representation of this on the star when those tools are in use, for example a red “X” through the star to show that it is not included during a Bulk Infrastructure upgrade.
Additionally, a tool to select a group of stars (either by some kind of drawing selection tool or more simply with a Shift + Click to add additional stars) and then perform Bulk Infrastructure upgrade on those stars only.