It would be quite fun to do with friends for a change, at least, rather than just facerolling through the experts (which I already never do, because it's boring).

I have not had any trouble clearing dungeons as minimum ilv even though I'm mediocre (it's how my group of friends runs everything) but I have had some issues when members are below the minimum ilevel, which is not enforced in some cases, as people can be obliterated by mechanics that are clearly only meant to almost kill them and this leads to a sudden spike in difficulty - the last 3.x dungeon's final boss can be extra stressful this way without a shielding healer. It would be interesting to know which dungeon encounters, if any, are especially hard with minimum ilv set given that they won't necessarily be properly balanced.