I think the ability to open up the description box of a list by pressing the down arrow is a very unusual and almost useless action. A better-organized board would be a series of dropdown lists divided by a well-defined line or empty space.
In other words, I'd like to collapse lists: see the big picture if I want to, and expand a list when I need to. Now, lists, tasks and dividers are a little confusing to me.
The description can go elsewhere, maybe with a "+" icon at the end instead of a repetition of the down arrow.
Hope this app/site will improve fast, 'cause I really like it and is far more enjoyable than alternatives such as Monday, Trello or Asana.
Bye!!