Here are a few quick feature suggestions bases on my initial use of wpDataTables. Some of these suggestions may have been submitted elsewhere or be in the development stage so forgive me if they're common. 

1. Include support for aggregation of grouped values. Might as well ask for the world right? ;)

2. Add support for state saving to allow the current configuration (paging, ordering, columns) to be persistent. This would allow frequent users to customize their viewing layout and not have to reconfigure it once again at page load time.  https://datatables.net/examples/basic_init/state_save.html

3. Include Select All & Deselect All buttons in the checkbox popups. In cases where multiple options are available it can be challenging to select which items are to be included. Adopting this convention would make it much easier.

4. Ellipsify long column names in the backend table setup and show the entire name as a rollover hint/title. In some cases, long column names can create overlapping issues when rendering.

5. Allow "entries", "showing" and "search" block visibility to be toggled for individual tables.

6. Add the ability to average column values (this appears to be a popular request).

These are just some thoughts based on input from users. The feedback has been very favorable!

Please let me know if I've missed something obvious. 

Mark