Dead money was awful. It was anoying, you couldn't even use anything at your disposal to beat it such as a equipment earned up to that point, Next to nothing as far as new weapons and other content goes, not to mention an area you could not return to, and a reward that was pointless! ( More caps, like I needed that! Like any body did, SO easy to get rich in this game, had 40k caps at least going into it...)
If this is your problem then O:A should be the worst.
You couldn't use the equipment you used in the main game.
It had 5 new things:
Shock Sword
Winterized T51-b
Hei Guei
Gauss Rifle
Trench Knife
Spoiler It did also have these items but they were simulation only and should not actually be available to players. (Although there are ways to get around it.)
Winterized combat armor
Winterized combat helmet
General Chase's overcoat
General Jingwei's uniform
Army mechanic jumpsuit
Winterized Chinese jumpsuit
Winterized Chinese commando hat
As compared to Dead Moneys
Assassin suit
Dead Money jumpsuit
Dead Money collar
Dean's Tuxedo
Father Elijah's robes
Sierra Madre armor
Sierra Madre helmet
Sierra Madre armor, reinforced
Sierra Madre helmet, reinforced
Vera's Outfit
Pre-War steak
Sierra Madre martini
Cloud Kiss
Ghost sight
Jar of cloud residue
Automatic rifle
Bear trap fist
Cosmic knife
Cosmic knife clean
Cosmic knife super-heated
Demolition charge
Gas Bomb
Holorifle
Knife spear
Knife spear clean
Police pistol
Throwing knife spear
Auto. rifle upgr. internals
Bear trap fist HD springs
Holorifle focus optics
Holorifle adv. calibration
Holorifle reinforced components
Embalming fluid
Gold bar
Sierra Madre playing card
Sierra Madre chip
Sierra Madre snowglobe
And an area you couldn't return to.
As for "annoying" I don't see how, you mean the collar and speakers?
Well in that case I could say the same about O:A.
DM and O:A both had unique design goals, DM being survival and puzzle solving while O:A had simulated bodies which disappeared.
If anything O:A should be the worst DLC for you. (Unless you haven't played it.)
Since it didn't even had any meaningful dialogue or options in quest other than: kill [censored].