Beyond the issues where the website seems to either be failing to load my account or failing to load my playlists, I'm also immediately missing the "watch later" bookmark that was next to the favorites heart on the videos. Going into the sub-menu for playlists is significantly slower.
Also, while it's a nice addition to be able to sort my playlists alphabetically when I'm looking at the playlists listing screen, what's still missing is being able to sort the playlists alphabetically when you add videos, i.e., in the "Add to Playlist" submenu. The search field is nice but is still not as fast as being able to use my mouse scroll wheel to scroll down my alphabetically sorted playlists and clicking without ever having to take my hand off the mouse to type in a playlist.
