I'd honestly love to see more of the Campaign Freelances added as Trusts (like Ferreous Coffin, Rainemard and Maat). Maybe you could get their cipher randomly when Influencing them? Or buy it with allied notes when the freelance is pledged to your own nation of choice.
Particular trusts I'd love to see amongst them:
Auroral Alicorn
Bravo (Achtelle's wyrm)
Areuhat
Azima
Duskraven
Kagetora
Lewenhart
Titania
Etc.~