That is good feedback! I have removed that category for now. It was intended for feedback on the theme we use here on meta when it was launched several years ago now already. We can always spin up a topic or category again when we want feedback in the future.
In the meantime, If you have feedback about the themes available here feel free to spin up a topic here in Site feedback.
You might have noticed that we trimmed back the list of available themes. This will make it easier for us to maintain them!
For now it’s just the meta branded theme plus the two options that shop with diacourse, horizon and foundation.