Thanks for the feedback here everyone! We’re actively working on improving the theme and component selection pages, and your feedback here is very helpful.
For the time being, we’re rolling back these changes while we continue to work on the new interfaces. We’re confident that when we’re finished with these, the new pages will be much more user-friendly and attractive than the current interface.
For those interested, here’s the PR for the rollback of the new UI, while we continue to work on improvements: FIX: Restore old admin themes/components page by OsamaSayegh · Pull Request #31887 · discourse/discourse · GitHub