As I'm defining lots of new content with lots of new custom caps, renaming caps etc I think it would be really great to have two buttons:
One button that prompts for a capability singular name, e.g. "product" and create the full set of capabilities
publish_products etc, etc. Creating them one by one is really cumbersome, involving much typing.
Another button which can delete multiple selected caps. I know that you should delete only caps that are not assigned to any users or roles, but the button may warn about that if the case. Alternatively, the current "Delete capability" button, could present a list of checkboxes rather than a dropdown select list.
The above two buttons would also allow "renaming", so to speak (delete and recreate), which currently is a real pain as both operations need to be done manually.
Sure, the savvy can just edit the DB definitions, but it would be nice to have the GUI functionality. Hope you'll consider this.
Cheers and keep up the great work!