I really liked all three of the new dungeons. All of the 2.2 content seems to have gotten away from dodging telegraphs--not that they don't exist, but there are new ideas showing and I like it. The doors on Diabolos, the bombs in brayflox, and even the "Absolute Bind" in Halatali are all great examples of ways SE can make content challenging without it just being dodge-dodge-dodge-hide-dodge.
None of them were exceedingly difficult, but the new mechanics are definitely a step in the right direction for my tastes.