@carmichaelc - I think a lot of teachers will struggle with this.
I am particularly concerned with the Explore task since I think it is a project that most students won't be intrinsically motivated to do it - and, I don't think it will take most my students 8 hours and I hate not having something for students to do afterwards. For students not taking the AP test, I will probably grade it and enter it into the gradebook - everyone taking the test will be "exempt" so it won't count for (or against) their grade. I would probably check with my adiminstrator first to make sure that is OK from an equity perspective. It is not ideal, but I think it will work.
For the Create, I think students will be more intrinsically motivated to do it regardless if they are taking the AP test or not.