Randomizing the dungeon itself is what they did in potd. No, it doesn't make it too fun. They're not meant to be grinded to death. Some puzzles would be nice. Also, cc is somewhat lacking in ffxiv so you can't make trash very interactive. Making people have to fulfill their own specific roles is fun... in theory. What we'd get is people crying over getting newbs who don't know strat. Rip.