With a recent Workboard consolidation of actions, we've made it harder to discover or quickly add tasks to a column. We should have a one-click means of task creation.
I was trying out the new wallboards features and noticed that it wasn't initially obvious how to create a task on the workboards.
I used my powers of exploration to find that it was hidden in the arrow drop down menu at the top of the column. My first impression was that this menu was for configuring details about the column.
I propose a dedicated link/button for each column for creating tasks in the context of that column.