Ask him if you can email him this entire thread. It summarizes all of the key points and contains a lot more content than you can possibly hope to cover. By all means, have the call, and pick your focus, but then, ask if he can read this thread to get more insight and also ask him if he ever even reads FT. Everything he needs to know is here.

FWIW - my top priority is the near impossibility of getting a UG on CO before 3/3 and COdbaUA after 3/3. For all the different types of reasons discussed.