The DkS2 DLCs have better level design than a vast majority of the Miyazaki games.
Old Iron king was excellent,the other 2 were pretty bad imo.
Sunken king was the worst,i hated that Aztec-like structures full of boring and empty rooms, the dragon bossfight was great though.
I really love the part when you descent into the old chaos and fight the ivory king in the last dlc,the rest was awful in every way and snow/winter areas are my favorite levels.