Thank you for the feedback! I'm currently investigating if it's possible to fill up the rows on the homepage, but as of now we are only getting the default number of video cards and then proceed to make the thumbnails smaller, which of course leaves empty space.

I, too, found the categorization of recommended videos better by far, but that's currently impossible to implement (at least as far as I'm aware). We would need to know which videos have which category to sort them appropriately, but YouTube doesn't provide them.

On the other side, I have good news for the removal of community posts: I'm currently working on the 0.2.0 branch (https://github.com/Cicero-Interactive/Classic-YouTube-Design/tree/0.2.0), which will for one also work with Chromium-based browsers and secondly it will give you a preferences dropdown where you can toggle the extension's features. This will later on be expanded, so you can precisely choose which changes you want and what should be left untouched. Stay tuned! And, of course, if you are aware of any methods to implement the fist two things you mentioned or want to contribute in general, feel free to do so and inform us on our GitHub page.