If there were a tickbox to make chat within a game public, games could be played in a "teaching mode" whereby the players could talk about their moves and anybody viewing the game could learn from the chat.

Version II of Teaching Mode would allow kibbitzers to contribute their own thoughts and queries.

Version III would allow the game players to control who kibbitzes and who gets to stay quiet.

Version IV .... lol.

If the idea proves workable then eventually there could be Learn The Game archives which could be browsed by beginners and players looking to improve. These games could perhaps be ranked by a "Level of play" and "Was this instructive?" voting panel somewhere on the game page.