What the DLC should contain (IMO):
a) Jackie friendship development should be a series of missions, instead of youtube promo video.
b) More exclusive missions to each lifepath, to add replayability value to the game. Choosing lifepaths should be meaningful.
c) Add more side activities, and NPCs (friends/romantic interests) to be able to go there with V to do some stuff. Maybe a Coop option should be nice, depending on the mission.
d) Player should be able to buy other properties.
Life Quality Patches to improve immersion, and to make the game fell more interactive, containing:
a) Better AI for drivers and pedestrians, so they behave more naturally.
b) Players should be able to interact to vendors to buy drinks and foods, with proper animations. Same goes to street vendors, they should be working, instead of being there, with arms crossed.
c) Combat rebalance. So, in this way VERY HARD actually make the player squeeze the upgrade system to play.
d) Craftable Skippy, so player is not force to choose between having a full weapon display, or completing all missions.
e) Animations for non player characters, so they properly open the door, instead of the door opening itself, and the driver teleporting into the car.
f) Make sleeping, bathing, eating and drinking more meaningful. Eating and drinking should have proper animations.
g) Make the mirror always reflect V's image, at least at V's apartment.
h) Make water react in a realistic way.
i) Adjust missions rewards, so players actually can buy all the cars of the game without grinding for hours in a meaningless way, or making some economy exploits to complete the game.