I would like a way to select a specific calendar, and be able to see ALL of its events in an agenda view (similar to Google's, or to how the current Search view looks). It would make it easier to see what's going on, screen for potential duplicates, and (hopefully in the future) batch-delete.
If nothing else, it could be as simple as adding "search calendars" to the search options (as of this posting it only allows "search events").