In software development, it's common to display a board with a two dimensional structure where the primary selected dimension is the columns (usually status) and then a secondary dimension down each column groups tasks by a separate criterion (commonly assignee). I think this could be a good feature for GoodTask. For example, consider a board with columns by priority and then within the column, separate groupings by reminders list as a way of grouping tasks by areas of responsibility or project.

Thanks for the feedback. I'll keep it on the list to consider. Thanks!