This deck, looks amazing. I've been looking for a modern deck that's not super expensive for awhile now and this takes the cake. It has really powerful control, a strong win con, and really cool creatures. I would suggest a few things however. 26 Lands is a bit much, I would probably go down to 23-24. Also Authority of the Consuls seems kind of lame in this deck, I would probably just put in another Thalia, Heretic Cathar, if you really like Authority though then I would just throw one in the sideboard. Then might I recommend Ethersworn Canonist, this seems to fit with your theme of locking down the opponents turns, and goes really well with Fatespinner. I'm super hyped to test this deck out, +1 to you!

Thanks for the feedback and the +1!

Honestly, Authority of the Consuls is in there mostly because I love lifegain and have a hard time putting together any deck that doesn't have at least something that gives me life. But you're right, I could probably just sideboard it and pull in another Thalia. And I think you're right: Ethersworn Canonist looks like it'd be a perfect fit.