Try making less conventional dungeons ones where its a giant puzzle where you find carvings and clues how to go deeper inside by completing each puzzle…maybe riddles that tell you how to unlock the next area but they constantly rotate Ex. “In the wall lies 3 holes each with a carving above it, one of a _______ another_______and lastly_______” each blank is interchangeable leading you to another boss in the dungeon to kill to get whatever clue it is. Hell it could be as simple as finding a hidden switch..that keeps moving every time the dungeon is loaded; or maybe you push the wrong button and the floor falls out? or maybe room fills with gas or you get teleported somewhere MY POINT IS BE CREATIVE))
Its not hard to use the same map but have randomly generated props and conditions within the map to reach the goal…this makes it fun…not fighting a boss that irratates you to no end…btw this also gets rid of speed farming….
Also make extra chests in the dungeons hidden behind false walls or destroyable objects… Make us actually dungeon crawl…not just play through an instance. Make traps hidden everywhere, jumping puzzles, mimic chests that are actually monsters…SUPRISE US! Every time we roll in and kick kitten . That would be epically fun… Hell give us a reason to try to explore the WHOLE dungeon every time….for greater risks and rewards…
Maybe add a class progression system in dungeons that requires certain classes to access the next area (this too can be randomly generated.)
Examples:
Thief:
Lockpicks on doors/chests/Disarm traps/Stealth challenges in hallways that can detect you.
Elementalist:
Lighting torches in a specific formation or order to open doors or reveal secrets or make a water/ice bridge out of a pool of water/using earth powers to reveal hidden stairs/using lightning to power old Asuran generators that could either activate OLD defenses or open your path to salvation.
Warriors:
break down weak walls with certain skills/hold open doors that may close separating the group temporarily/knock down pillars in dungeons to reveal another floor.
Guardians:
could set up base camps or deploy points(checkpoints complete with repair nodes a ghostly foiefire npc merchant and a Waypoint complete with force field and foiefire weapon guards) in key areas to not halt the progression of the group.
Engineers:
could repair old bridges or passages not in use or reconstruct old golems/turrets to help fight temporarily.
Mesmers:
could reveal false walls invisable paths and “tears of the mists” leading to hidden content.
Necromancers:
could raise dead npcs temporarily that might open other objectives within the dungeon or have them drop items or remove traps or just plain fight with you.
Rangers:
could use existing animal ai to “scout” ahead (by possession of course) or lend assistance within said dungeon….maybe there’s no way to cross a huge gap, but there’s a falcon you posses it find a switch and boom a bridge drops down.
Anyways thanks for the time, please leave comments and additions if you would like to.