Now that I’m back home, I’ve checked my account via the computer webpage (as opposed to my phone while on vacation).
I appear to have access to the expanded Max properties to 6 months. For example, it appears that it will allow me to book a 2 day stay at the Point at Poipu, and for $0 reservation fee (though I did not finalize the booking), but in setting up a booking to legacy HGVC or W57th (which I just added resale and seemed to trigger the “Max upgrade”), it still has the $69 reservation fee.
So I appear to be “half Maxed” at the moment. I’d like to actually make a speculative reservation now to park my bHC points, and was planning on calling to pay for the AI option, but am waiting for now to see if I eventually get the “full Max” treatment and can book without reservation fees.
Additional edit: it appears I have the free guest certificate (per year) as well.