Ok, let me preface by saying that the main issue I have isn't with the story or ending, or any of the games systems or mechanics but rather the lack of any real dungeon crawl or end game content. My main party has come together with everyone finally well suited to their given role in the party (nice synergy of gear+abilities) about the time I'm wrapping up my bounties and other side quests. I actually put the game down for months at this point as I was afraid the ride would end the moment I proceeded through the storm in striving toward the stories conclusion. Suffice it to say by the end of the game my characters still had room to grow as I still had not unlocked all the abilities for all my characters and yet I ran out of things to do. Worse yet I ran out of things to do just as I was becoming satisfied with how my party was coming together. I never really got to enjoy attacking any challenges/content with the party I had spent so many hours building.
I ended up using an older save game to go back through the game and look to see if I had missed any encounters or locations on the off chance I could find something to do with this team of bad asses. (to no avail)
So, I finally have this great team but nothing for them to do. Which brings me to this topic of discussion. If random content isn't good for the story, what about a random dungeon "play ground" as a DLC just to have some where to go and have some fun with your party outside of the principle content? Could even make it interesting by building in challenges and achievements?