I hate to say it, but the story reminds me of IWD1. You are nobody, just a group of adventurers, and you are not the chosen one. Also the backdrop of the story is the old rift between the dwarves and the elves that caused their demise to the goblins, and you get to go through all those areas and find out about what really happened during that time. Except this time we get to find out what happened in the battle with the King of Shadows.
As to the warlock, I like it, as I like variety. I