Need more. I for one want to see at least one or two Middle East sponsors, another sponsor from India, and some more Asian Sponsors.
Though hopefully when the patch goes live The Holy See, The Christian Democratic Commonwealth, and some other sponsor's UA's get fixed. A lot of custom sponsor's UAs don't work for me or will work only sometimes, which is upsetting cause a lot of them are really interesting, though I expect it has something to do with the game being buggy. Though no matter how annoying that UA for unit disappearing is when using The Christian Democratic Commonwealth is, I have to use them cause I love the Bureaucrats colonist addon. Fit's my playing style so well.
I just had an idea though for an update to The Holy See's UA. I think it would be kinda cool if you can add to it, though im not sure how balance this will be ill admit it, an ability to construct "holy sites" when an explore finished an expedition. I really think this would be a cool idea.
edit: Found a bug. I have a game where The Christian Democratic Commonwealth UA is working for me, but for some reason the capital is providing +2 health instead of 1. Though my other cities with naval garrisons are providing the correct value.