Nintex "Site" Level Forms
I suggested this to Euan several months ago. Currently there are forms associated with a list and workflow. It would be extremely valuable to have a form that is associated with a site (kind of like a SP site page) that has access to all lists and libraries in a site. That way an entire solution could be built out using only Nintex Forms. Also posted this as an idea for O365 Forms.
Thanks for your suggestion.
I will update this idea if there are any updates to share.