This isn't working for me. At least, when I click "full" at the bottom of the menu, if I then click "see all," "add a comment," or "comments," it goes out of full screen back to windowed mode, and the comments still appear in the sidebar.
But even if it did work, using a fullscreen mode is not my browsing preference. I'd really like to be able to read comments at full size in windowed mode.
I'd find it more intuitive if "see all" below the comic expanded the comments at the bottom of the screen, like how comment-viewing worked previously, while the "comments" button in the menu opened the sidebar.