Some people complain that Garnet is currently getting little screen time.
I think that is just the logical consequnse of her being so good at everything. Garnet is at peace with the world and oneself unlike most of the characters in Beach city. And she can handle most of the things the universe throws at her. She rarely create problems, but can often solve them.
So everytime she takes action, you know, that it's super cereal. But she is kinda overqualified for episodes that aren't about saving Beach City or the world. I even suspect that Garnet sometimes simply decides not to get involved so Steven and the other learn to be more indepedent.
A think as soon as things get more serious, she will get more screen time.