After rehashing all the old, familiar Naxx fights, we enjoyed Malygos. It's definitely unlike any previous encounter. The strat is nontrivial, and we got to ride around on flying saucers and dragons.
We had a few bumps along the way, what with people ignoring the GMOTD for a month (/grrrr) and coming to our early attempts with UIs that didn't work with the drakes, but it was actually pretty fun to tackle phase 3 once we got the UI thing straightened out. Apathy came up with a nice macro that allows even the oldest, slowest, most decrepit drake to attack, heal itself, and avoid Malygos' sparks at the same time. With enough people successfully doing at least two of the three, Malygos was defeated and Alexstrasza dropped in.

Drakes like migrating butterflies on the loot chest:
