I love opinions but you have to explain. Dead money was pretty dull. O:A and Pitt were pretty dull. I enjoyed Point Lookout and Broken Steel. Pick it apart man.
There's your problem, you enjoyed bullet sponge DLC's with little to no decent story (part's of PL were just random [censored].)
O:A while extremely linear, had a better story than all of the DLC's (and the game itself IMO, but it still was'nt the best story made.)
Pitt was dull, I give you that, but to say Dead Money is similar to this because it's dull? (Which is your opinion, so here is mine.)
Dead Money has decent combat, a good story (Could have been better, but everything was written well.), it actually lasted more than one hour, and the feel was a bit different, but good. Maybe this is just you thinking it's dull, but honestly? BS and PL were among the boring DLC's of FO3. (and MZ is in the lead in both boring, horrible writing, horrible combat, horrible setting...)