Panorama enables the easy creation of issues from within the Panorama view. Simply click "+” under a directory or issue. Choose the Jira Project and Issue type, and enter the summary (or epic name) and hit return.
Please see the screenshot below for details:
Yes. If you create issues under the epic in Panorama’s view, they will be automatically be added to the epic you’ve chosen.
Yes, you can create sub-tasks just like any other issue types.