HI Xander,
Thank you for your purchase.

1) 

For now only with Gravity forms integration the tables can be editable ( for Formidable we are looking to add this feature for some of our next updates) 

As for the fully editable, for now we covered almost every column type from Gravity forms main plugin, but column types from Gravity Forms Add-ons may not work properly.

2 and 3 ) you can take a look at our documentation where you can find more information about this requests below.

Also keep in mind that there are some limitation on Gravity side which we noted :

• Gravity Forms integration addon is working with a wpDataTables plugin and a core Gravity Forms plugin. However, integration with other Gravity Forms addons isn’t confirmed so we cannot guarantee that it will work.
• Unavailable options – Because we are using Gravity own forms for editing functionalities, some features are unavailable in both table and column settings. These options are grayed out and disabled.
• Searching and sorting with Server-side processing – After turning on server-side processing sorting and searching may start to behave unexpectedly. We plan to work with Gravity team to improve it in future versions.
• Editing existing entry for multi-page form – Editing will work but it will be rendered as a single page form, the same way as it is on the Gravity forms edit page.
• no Duplicate option not working for editing existing entries – Gravity form doesn’t validate this option on editing existing entries.
• Configuring table relations (foreign key) – This option is not available for Gravity based tables
• Choosing editor input type – This falls under the first limitation. Because we are rendering Gravity form in edit popup modal it is not possible to choose editor input type

Best regards.