Itch.io is a store front for players to purchase games, I think the forums should be a place for these players to engage each other as well as us developers. So perhaps there could be a forums like 'Games on Itch.io' where players can talk to other players and create threads about games they are playing /purchased from Itch.
It seems like we have a solid community here on Itch which is fantastic. But ultimately we develop games for players and itch serves games to players. The forum should focus on nurturing a community of players - certainly this is important for the growth of itch.