1) Ghost People are annoying as hell to deal with
2) There are 30 Gold Bars in Bank Vault.
3) Have explode collar on your neck
4) There are speakers, radios that can kill you
5) Can’t return to Dead Money. When you return to Mojave.
6) Poison Gas
7) Can’t return to Bank Vault after completing storyline of Dead Money.
8) hard to get explosives skill book. Being that the skill book under a bed. The only ways to get the book is by using explosives or dropping throwing spears to force the book out.
In my book Dead Money is my less favorite DLC for Fallout New Vegas for those 8 reasons.