Permissions for edit or create action

When using line items this extension is in my opinion indispensable, but very delicate.

It would be convenient if there were configurable permissions to use it, both for editing and for create actions, for example:

• "edit lineitems"
• "create lineitems"

What do you think?

If they are added, is there any way to give them a default value so that those who are using the extension no longer work on it because they have to set permissions?