The new Kanban board feature is excellent for managing feature workflows, but it would be equally good for managing idea workflows.
Currently, the Idea list and chart views are provided to aid in Idea workflow. Through each of these screens, custom views can be created through filters and columns to aid in providing the key information needed to move Ideas through the workflows.
The Kanban board is more meant to be used to manage feature workflows for each user.
At this time, based on the current available options in managing ideas, combined with current priorities, we are unlikely to make changes in this area.