I would like to see a dead magic zone where magic does not work.
i remember someone once suggesting this idea, but there was some problems in creating such areas, wasnt doable or something like that. and though would it even be logical to have such areas in Barovia? All that "lets do a dungeon that has dispells flying all over" talk is kinda odd and feels bit ooc-solution to topic "wizards and dungeons". Which amazes me little, whats with the wizard shafting again? Fighters are these days pretty powerfull with all the weapons and items they can have.
i would more encourage dungeons that would bring out the best in the characters class, a dungeon where your survival depends on your skills. Not some dungeon which is mainly built so that it slaps wizards ass and melee folk can be happy there.
Keep in mind that as you walk in such dungeon, you are propably buffed. do you think that the dispelling monsters only hurt the wizard but lets the buffed ones walk free? Newsflash, when those monsters dispell your warriors buffs, the wizard has been eaten and you are in quite a pickle (possibly). And your fighters all herbalist buffs would get dispelled aswell, so its kinda +/-0 situation anyway
however, one could create such dungeons where you need various traits to succeed, rusted levers need a strong person to yank free, magical door could use a wizard to spellcraft the runes and if succesfull they would learn the ancient word for opening the door. You would also need a thief to open that complex lock, one that could have been scripted to be opened only by a rogue for example.
Theres gazillion ways to build a interesting dungeon, and it doesnt always have to be full of monsters either, you could have a dungeon that has rich history and background, you could have dungeons that dm's will bring to life.