This mechanic does not need much dev time to change, so it can still not be final.
Actually you're incorrect.
These mechanics are fundamental to a games design ... weapons, skills, character/NPC stats, the economy (what costs how much, how readily available is it), how many enemies can the player be expected to be able to kill how fast, etc. So, no, it's not something that can be changed easily, or at this point probably at all, tweaked, definitely, changed, no.
If it is we are looking at a game with bad gun mechanics + terrible AI + bullet sponges + boring bonus %dmg skills... That won't end well.
If you're looking at CP2077 as an RPG ... well ... the gun mechanics have little if anything to with traditional character skills mechanics.
As an FPS it's not a combat centered game, so don't expect it's mechanics to be as refined as games that are.
We have NO CLUE how good/bad the AI is at this point. All we've seen is some VERY set piece demos, zero actual gameplay.
A certain amount of bullet sponginess is necessary in an FPS, we can't have your character being killed from a single hit, thus to be "fair" neither can NPCs. The REAL question is "How spongy should they be?" Two hits? Three? Five? Currently (from the demos) it seems to be one with a shotgun (not including "bosses" ... of course) and five+ with a handgun.
Plus damage and additional ways to attack (new permitted weapon types, new attack abilities, etc.) seem to be a staple of FPS games. After all if your avatar could do everything a real person can do at the beginning of the game there's no "sense of improvement", and since it's an FPS the accuracy of your attacks is entirely in the hands of the player thus that can't be improved.
Again ... if you're looking to CP2077 to be the next "Fortnite" or "Call of Duty" you're looking at entirely the wrong game.