On the flights I've been on, the FA's walk through the plane with a list of Classic Plus, Ascent and Summits. They then scan their card through the TV to activate it. The implementation of Classic Plus didn't change that since they were already doing it for Ascent and Summits. I've never seen them miss that although I've had a couple times over the years where I swapped seats to accomodate a couple who wanted to sit together and had to tell them I had switched seats.

Did you see them walking through the plane with a list and swiping their employee card into the TV? Did you raise the issue with them?

As for the energy drink and water, the web site says "[s]elect an alcoholic beverage, a bottle of water, or an energy drink." Not sure if that means an (as in one) or an (as asking the FA whenever they come through). Did you tell them you were flying on a Classic Plus fare?

Finally, did you book over their website or through Orbitz/Travelocity etc. I think there are some problems translating the fare system on to third party sites.