They scrapped them and left one node with updated modifiers/power disabled that is now for players that want up to 400 gear. [quote]Since a vast majority of players will be at 300 Power or above going forward due the Techsec Supply Drop chest (details below), Normal, Advanced, and Expert Quickplay nodes have been removed as has the Expert Matchmaking tier from direct launch so that you can find players when you try to matchmake. This new node has been adjusted so that anyone from 10-399 Power can earn good rewards from it.[/quote] https://www.bungie.net/7/en/News/Article/destiny_update_9_1_5_1 For Master, Grandmaster, and Ultimate difficulty you will need to select the individual activity and then set the difficulty through the customize menu.