So I saw someone post in the CB that if you switch your message editor interface (settings > general settings > standard editor), you can quote and edit your posts. I tried it and it works, though not in the way that we were used to in the past but hey, it allows quoting/editing.
Note that this doesn't fix the insert video/image option, still gotta copy and paste images and/or use code.
- - - Updated - - -
Note that you have to double click the "reply with quote" button for you to quote.