MEX-ORD: expect nothing, not even coffee (in the forward cabin).
MEX-AMS: beef dinner in F was a cheeseburger, not sure what you got if you selected the pasta option. Breakfast equally slim. The bar is open on the 789s, the usual stuff but no champagne, the coffee machine was what interested me and keeps getting jammed with the packets. No sammiches either just peanuts in plastic wrap.
Given current loads, service was actually great (attentive). I suspect there was alcohol in coach, meals were also served there.