Thanks! I have a question about some of your recommendations--can you explain your thinking a bit on some of these?

Downgrade CFU to CFF: Why? CFU is my workhorse card.
Downgrade CSR to CSP: I agree. Could I potentially get an upgrade bonus going from CSP back to CSR after I downgrade if it has not been 48 months since my last Sapphire bonus?
Skip VX: Why? The card pays for itself, is good to get early, and I get 10k points/year.
Get Boundless, IHG, United, Aeroplan (this brings you to 5/24): Wouldn't that be 6/24? Why IHG/United/Aeroplan as opposed to others?
Skip Hyatt
Get and keep Strata Premier: Why should I keep this card? Isn't VX a much better option?
Get HA or AA (get HA better, get AA from Citi): Barclays AA is going away, so wouldn't it make sense to get it asap?
Get Aspire and Surpass

You can get 2 Chase cards on the same day (2/30 rule): Would this create only 1 HP?
You can get Aspire and Surpass on the same day. You can only get 2 Amex cards in 90 days.
Barclays has 6/24 rule and 1/6 rule: I haven't heard of the 1/6 rule.
I would consider getting Citi AA Platinum Select instead of Barclays, which you can later downgrade to CCC: Barclays AA is going away, so wouldn't it make sense to get it asap?
You need to get Amex BBP in order to keep your MR points. There was an Amex Everyday option, but it's now discontinued: Business cards aren't an option, unfortunately