I noticed when you are editing a cell, the options to change the text fonts, color, bullet points, etc. are fixed to that specific cell. This becomes an issue when the cell becomes very tall and the bar stays at the top of the cell and falls off the page. Having to scroll up and down every time you want to add a new bullet can become very difficult. A great solution to this could be to add the cell features below the already existing options at the top center. I'm thinking similarly to google docs. I hope that helps!