Would love if App Studio allowed for custom CSS and potentially JS code injections. This would bridge the gap between the no-code App Studio and the all-code bricks. I am imagining something similar to Squarespace's setup (but for reports instead of a website) where everything is no-code unless you specifically go to the custom CSS and code injection settings. Non-coders would not even notice the option is there, but it would be amazing for users with more specific styling and functionality needs who don't want the work or maintenance of the pro-code editor.
I would love this feature since my team builds cards in the Card Analyzer because it is quick, easy, and accessible to all coding levels. Building in the pro-code editor is somewhat off-limits since it requires coding knowledge to maintain and edit, but at the same time we are limited by very simple App Studio theme settings. With this feature, the coders on the team could customize styling while still allowing everyone to work on the content of the app. I would imagine JS code injections would not affect card functionality (otherwise the pro-code editor would be more useful), just the app elements. Personally, I would prioritize custom CSS over code injections, but both would be great!