A notification is a possibility but they aren't meant to be 'super' weapons anymore. They are meant to be a rough thematic counterpart to the Loyalist ability to have 2 starbases in a gravity well. Should we notify when a loyalist player builds 2 starbases?
Maybe we have some numbers to tweak to bring it back in line.
I'm also thinking about a planetary shield of sorts that is available earlier in the tech tree. It wouldn't be as good as the starbase one. It may also have other applications.
Lots of experimenting to do, so the feedback is very useful, thanks!