Planner's management of buckets
Need easier and quicker ways to manage the buckets by providing sort the list, manage the buckets via a list (move up/down), move more than one bucket at a time.
in a team with more buckets than the width provides, it is hard to move a group of buckets from the end of the list to the beginning.
Mike Hofer commented
One area where this is particularly evident is when you are grouping by labels.
If I don't have any tasks in a particular label, and that label is using the default text, hide that label bucket to conserve screen real estate.
I'm sure similar reasoning could be used for other grouping scenarios.