The latest review for Dungeon Siege III's first and most likely last story-based DLC comes to use via GamersDailyNews, 8.0/10.
The integration of the crafting and Ultimate Power add-ons felt pretty fluid. I probably diversified more than I should have. I wanted to see what differences, new variants, were introduced and so splashed points across whatever new Power Level was opened up for me.
Treasures of the Sun gets an 8.0. DLC is supposed to make the game better, richer, longer, etc. This does a good job in those goals with the addition of crafting, level cap lift, and new environments.