Did you use the turrent at the war den Xan? I needed it for several battles in this where as with Borderlands 1 I barely used it cause it was too easy
They did a super good job fixing the enemy difficulty balance
edit: btw, another gripe I have is the maps are a bit confusing on the layout, I try to reach a waypoint marker but get stopped by the edge of a cliff or a mountain wall. I wish the Overlay map wasn't blacked out until you discovered it, it never was that way in the first game.