--- The Finale ---
If you've already watched the anime, this manga shares a very similar plot with it until the last few chapters. The only things I'd consider major are Kaji's and Rei's added character development (which alone already justify you reading this even if you dislike these two characteres... Or better: they're the only ones that justify you reading this). Every other character though (except for Shinji) lose their development by the end. I'm not kidding, they LOSE it. I never imagined I'd ever experience something like that in my otaku life, but that's it.
What Sadamoto seemingly tried to do here was mashing up the original's and the movie's endings. The attempt could seem interesting at first, but I can't say the same about the result. What basically happens is that Shinji (apparently) creates another reality with the powers of instrumentality and starts living there as the boy he always wanted to be. He still learns to accept others and... Well, he's basically the same guy, but eveyone around him lost their memories. As a consequence, we never see Asuka having the chance to redeem from her past and learning how to accept others, nor do we see Katsuragi face how emotionally miserably she is inside.
You can argue that "Oh, we lost some, but gained some, so it's okay". It isn't. The show was yet unable to live up to the its own theme. As one can notice by the term "Neon Genesis Evangelion", NGO was an anime about having a new beginning in life and thus it's never too late to start things all over again and have a happy ending. The manga's ending wasn't a new beginning, but a total restart! Evangelion isn't about going starting things over, but working for the answers in the present itself.
Another thing that doesn't favour the "character development tradeback" is the fact that this focus Rei gained was actually what caused the manga's downfall. Not that it's her fault at all, but the reason Shinji denied instrumentality in this one was because Rei taught him how to love others and, therefore, Shinji creates another reality to keep up with this feeling, unlike in the End of Evangelion, whereas when he gets into intrumentality, he denies it not only bacause he still doesn't feel loved, but also because he hates eveyone. He leaves it so he won't have to be close to Asuka, but once she's still there, he immediatily goes on killing here and changes his mind when caressed in the face and notices that he does can feel and be loved by others. That scene was the biggest character development for both Asuka and Shinji and yet it's totally missing here.
After all this rant I gave you, you may be thinking I hated this manga. I didn't. Is the premise broken? I'd say almost so. As I said, this review would be in comparision to the original ending, so in this point... Yeah, the manga is worst. Is it shit? No. Evangelion has way too many qualities to be completely downgraded by an unfulfilling ending. If it wasn't for the last chapters, I'd straight up score it a 10, but for reasons already mentioned, I now can't say it's good, but I can't say it's downright bad either; therefore I give it a 6.
