The point of having multiple endings ist to offer to everyone the ending they would enjoy the most.
Making 3 (4) + 1 bad endings is not good marketing, this way you loose people who don't enjoy a bad ending. Point to make, everyone who really did not like the endings and after reading reviews does not like the new one eider will NOT buy the DLC and this means $$ lost for DC PR, with this ending CD PR just screwed themselves out of 30 bucks with hundreds of thousands of people, millions of revenue lost.
Also what annoys me most is that the endings are not realistic even within the sci-fi world setting of the game.
First of all, an engram is an engram its software doe snot mater who's, Jony being able to stay in the body but V not is plain stupid, its bad writing its forced BS for the sake of getting the story where one wants. This ending should be at least no mater who stays in the body the body dies, that would not be good but would at least not be stupid.
Second Arasaka made that darned thing, if some one can remove it than its them, ok may be its not removable at all, but then how can the FIA remove it, I'm sure Arasaka has their stock of illegal AI's as well, its not plausible that the FIA could save V's live (even though handicapped) and Arasaka could not, that's again bad writing, lack of adhesion to the own world building.
Thirdly the FIA ending, the human brain is not made to interface with hardware, its highly implausible that it could get damaged in a way that does not make one severely disabled, but only prevents interfacing with unnatural components. Its painstaking bad writing, its beyond bad, plus a lot of combat implants in arms legs etc do not even have to interface with the brain, attaching to the peripheral nervous system would be good enough. Also what struck me as very suspicious was how fast Victor came to the conclusion that there is absolutely nothing that could be done, come one really? Nothign? Only from telemetry, no brain biopsy no nothing, ... try some more sensitive transducers, kranial stem cell infusions, drugs? I'm sure that's a solvable issue. In my head canon Vic now under a corporation boot was forced to say this, V's fine except for probably some FIA installed software limiter, that a skilled net runner could remove.
So here is my pitch for a Cyberpunk 2080, setting NC still under Militechs rule is on the verge of new corpo war with Biotechnika, the tensions are being manufactured by the NUSA, the FIA is runnign false flag operations to start a war between the two parties, scheming to sweep in once boot sides are exhausted and take NC once and for all. In that setting V after a few months of physical therapy (why V lost their implants all the money earned until then was sitting comfortably in their bank account multiplying, now ready to be spent in huge quantities on the best doctors, and physiotherapists) and not wanting to accept the situation finds out that their current state is not a result of their physical state but indeed a well disguised FIA malware intended to keep them from interfering, finds a capable net runner, or just lets the entire hardware be replaced just to be sure no backdoor or so are left behind, gets new implants and ventures to prevent the upcoming war by exposing the FIA operations in NC.
Now isn't that a good sequel it even provides a really great, plausible, consistent in universe explanation why the player has to start all over with V from 0.
And if we want Jonny back, there is no plausible reason why the FIA could not make a copy before erasing the relic, so we could have a mission where V breaks into a FIA facility to steal the new chip Jonny is on, just may be this time don't put in in their head, instead find for it some nine inorganic matrix to sit around in V's flat and to chat with over the holo whenever they want.