I just can't help but feel how AMAZING I think this game would have been, if I didn't have to suffer through the crashes and glitches and dumb AI to get to the end. I feel like there needed to be more bosses, more legendary items 'out in the world' as opposed to being readily available to purchase if you have insane gold. I also didn't get to tech out a tree properly, and finished the first play through at level 28ish or something, I think. It would have been good if there could have been a bit more mandatory content to make you tech out a bit more, and I think playing on 'normal' was actually really easy. In some respects I guess this adds to the replayability of the game, but as I say I don't think its worth the pain right now.
The game does have independent bosses, or mini-bosses to be apt. There are Cyberpsychos, and their hardness to beat entirely depends on your level. Only story DLC will add more story bosses.
Free DLC... looking at The Witcher 3,
DLC drop 1:
Armour (Temerian)
Beard and hair styles (barber)
DLC drop 2:
Alternative Yennefer style
New Contract (Missing Miners)
DLC drop 3:
Armour (Nilfgaardian)
Weapons Set (Crossbow
Then I don't know the order, DLC drop ?
New Quest (Fool's Gold)
GWENT card set (Ballad Heroes)
New Quest (Scavenger Hunt) / Armour (Wolf School Gear)
Alternative Triss style
New Quest (Skellige's Most Wanted)
Alternative Ciri style
Quest (Where the Cat and the Wolf play...)
New Finisher Animations
Lastly they added New Game+ mode
All in all, IIRC, they added 5 hours gameplay in total and added new game+ to explore a new game with a current character.
Free DLC in Cyperpunk will likely include new styles appropriate to everyone who may be romanced, but likely limited to the longer term options like Judy, Panam, River and Kerry.
Gang related armour is a likelihood, Maelstrom like body mods maybe, and a barber (people really want to change their hair styles at the moment), and More legendary weapons.
More Gigs and NCPD missions, and a new side mission or three.
More animations, like being run over by a car which has a single generic animation, take down animations (cough ala Deus Ex), and so on.
New Game+ will again drop last, and when they have their save game issue under control because something isn't right with how game state's are stored especially when it has been exploited.
There are many things in the game world which are uncompleted like the rail system and underwater mechanics, amongst other. This will maybe come with new story DLC which will be paid content where they may even expand on the parkour mechanics (which is also highly in demand by the community, Mirror's Edge style).