Meh, it's okay if you like the base game. The main problem is that it drags on forever towards the end. If you complete it you get some goodies in the main campaign.
However, there's no real reason to replay it since it's relatively short, you characters don't get many levels and your choices don't matter much or at all.
I'd give it a thumbs up if the last dungeon wasn't full of encounters with the same types of enemies and lots of "gotcha!" rooms with mimics.

I'd prefer it if they made dlc that added things to the main campaign and more classes and archetypes.

Meh, it's okay if you like the base game. The main problem is that it drags on forever towards the end. If you complete it you get some goodies in the main campaign. However, there's no real reason to replay it since it's relatively short, you characters don't get many levels and your choices don't matter much or at all. I'd give it a thumbs up if the last dungeon wasn't full of encounters with the same types of enemies and lots of "gotcha!" rooms with mimics. I'd prefer it if they made dlc that added things to the main campaign and more classes and archetypes.