I would love a broken steel dlc for nv. I know ppl say nv has different endings which is all good but why then is broken steel rated one of the best dlc's?
Broken Steel was well received because it fixed the massive plothole and copout that was Fallout 3 ending. Two different companions that are immune to radiation and we cannot tell them to start the project just because someone HAS to die? Really? One of them being immune to radiation was a damn PLOTPOINT two missions before the ending and dev team convienently ignored the whole thing. The ending was simply illogical forced drama that had almost no effect to the outside world. A couple of water caravans was enough to incorporate the new ending since there were pretty much no sidequests that had anything to do with the plotline of the mainquest and didnt need to be removed or modified.
New Vegas ending on the other hand HAS an effect on the Mojave wasteland. Incorporating the endings into post-end gameplay would take a lot of work. Also a huge chunk of NV sidequests are somehow linked to NCR vs Legion plotline and would become illogical if player was allowed to continue. Boone's sidequest? Gannon's sidequest? Half of Strip sidequests? Pretty much every NCR/Legion sidequest? They all would be illogical after the ending and would have to be removed or HEAVILY modified to make any sense. If player was allowed to continue after the ending, so much content would be removed that there wouldn't be much to do for anymore. It is one of the drawbacks of making sidequests interwine with other events but in my opinion it's still better than having the sidequests exist in vacuum like in Fallout 3.
In short Broken Steel fixed Fallout 3's broken ending while New Vegas ending isn't broken and therefore doesn't need fixing.