I felt that the MSQ quests were a bit thin, but that the Void Ark story made up for it. The final cutscene there was as beefy as any in the 3.1 chain.

The new dungeons were beautifully designed, but the quest lead ins were not exciting at all. It's like someone spent all their effort on a perfect science project, with beautiful printed labels and perfect charts and graphs and rock solid results, then realized the morning of the science fair that they'd never actually written up the "introduction" or "conclusion" for their display board, and hastily slapped it onto the display in marker at the last second.