Im more than fine with 1 dungeon a patch, dungeons get pretty boring and mundane after the 1st couple of runs. If anything id rather like see them mix things up than the usual, trash, boss, trash, boss deal. Dungeon puzzles, dungeon challenges, maybe last boss changes on how fast or slow you get through dungeon like its charging up its strength or clearing fast enough unlocks a harder version of boss, maybe could have different routes, could split the party, or how about no routes and its just an arena gauntlet with random monster waves and random bosses, maybe get buffs if clear waves fast enough or something. But yeah if they're going keep doing the same old same old 1 dungeon is enough...