I don't like that all but one of the DLC adventures lock the door behind you when you enter, forcing you to finish things if you ever decide you'd like to go back to the wasteland, (except for Dead Money, which seemed appropriate, as it was apparently all about traps) but the deathclaws and cazadores didn't bother me that much, it is the deadly, dangerous, post-apocalyptic wasteland, afterall. Besides, as I think someone said, you can get around them walking towards black mountain from the start, shaves some time off the story's sight-seeing jog (if you ignore everything) and got me to Vegas with maybe two or three encounters.