Using Notebooks myself, all the time, combined with GoodNotes.
These two apps can exchange pdf directly, it's working really great. But...
Apps like Meetings, Minute Taker and perhaps others, allow you to set up a meeting agenda, send it to the attendees, add comments during the meeting and again send the minutes to the attendees.
Maybe you've found ways to build a workflow like the above in Notebooks? It is, after all, a powerfull app. However, I found myself hassling too much after the meeting to get a working document for all the people involved.
Anyway, I ended up purchasing both Meetings and MinuteTaker. So far, my preference goes out to MinuteTaker - just a first impression though. I obviously need more time "in the field" before making a solid choice.
BTW Thanks for pointing me out to Curio, a complete unknown to me until today.