TwoSix
Everyone's literal second-favorite poster
What I think a lot of people forget about play agendas is that there was not an assumption that every player had one. A creative agenda was something a group of players could choose to pursue.Not sure what to tell you other than GNS is technically about classifying the play agendas of players.
I do agree that the 8 Aesthetics of Play is better but it's aimed after the same idea as GNS: what are players hoping to get out of playing this game? However, GNS was modifying the preexisting model of GDS.
A lot of play, perhaps even the majority, is functionally agendaless.