The ability to use regex/contain/not contain in view and dashboard filters. Especially of the Location/List filter and the ability to select the task/subtask name using the same filters.

This would give us the ability to use naming conventions for tasks and lists and selecting these automagically. At the moment you have to go into the filter and select everything manually. It would be nice if all the lists/tasks/subtasks with a certain name would be filtered automatically using this feature.