The good? It adds valuable perspective to some characters who were somewhat lacking in NGE/EoE (Gendo, Rei, Kaworu) and gives Shinji a happy ending that feels earned through self-determination rather than the literal handwavy bullshit that was NGE 25+26 or the incredibly bleak resolution in EoE. The scene where he talks it out with each member of the cast before sending them on their way felt like a way better reimagining of the infamous "Congratulations!" scene, and I was waiting for everyone to show up on the beach like they do on the poster for one final goodbye, which I'm a bit disappointed didn't happen. Rei is the real big winner of the Rebuilds for me, since in NGE she basically disappears from the story once Asuka shows up. If Asuka and Shinji's relationship was the main focus of NGE, then Rei's relationship with him is undoubtedly the focus of the Rebuilds, since her arc (which is central in the climax of 1.0 and 2.0, and one of the main focuses of the first half of 3.0+1.0) is explicitly, by the letter, about her falling in love with Shinji. also, fucking lol, her death is basically a copy of Nia's from Gurren Lagann, whom the long-haired Rei also brings her to mind. Not that I particularly mind that, since I also liked Nia. Overall, I like it as a positive re-interpretation of the same themes as End of Eva that's not really trying to take its place. While EoE is the superior movie by far, it's not like I was expecting 3.0+1.0 to exceed it, so I was pleasantly surprised with it and feel comfortable enjoying it as its own thing.
The bad? The big action sequence in the middle. I tuned right the fuck out because it's just mindless action with little purpose or impact. The new Eva units are complete fodder, and Unit-8's overlap capability is really cool, which makes it worse how criminally underused it was. There was so much going on that I just stopped caring because none of it felt like it really mattered. It's impossible not to measure the action in this movie against Asuka vs. the MPE's from EoE. Unlike most Eva fights, this one actually felt like hand-to-hand combat between skyscraper-sized flesh robots swinging around massive swords. It's a fight with both physical and metaphorical weight, and its brutal conclusion is basically what drives Shinji over the edge and kicks off the start of Instrumentality. Here, they're just easily dispatching literal massive hordes of literal faceless fodder while flying through a red void... and for what purpose? None of it fucking matters. I wish they had instead put their budget and effort into one fight and actually made it count for something instead of blowing their wad on 30 minutes of flashy but ultimately unmemorable action.
Another thing in the department of "pointless bullshit" is the fucking lore. I hated it in 3.0 and I hate it here. I don't give a fuck about the mechanics of the spears, and trying to actually explain what everything means only muddles the metaphors and makes things make LESS sense. NGE had the perfect amount of lore, where if you squinted and didn't think too hard you could see what they were going for with AT fields being a metaphor for people's psychological walls and all that nonsense. Adding in a bunch of specific mechanics just makes these metaphors break down. Like, what's the metaphorical significance of Eva-13 having no AT field? What the fuck are the spears supposed to represent, if anything at all, for how much emphasis is placed on them by the characters and the plot? Does any of this matter? (hint: no.) Evangelion is at its best when these things are left as half-explained metaphors that you can bullshit together some thematic explanation for. Overexplaining the technobabble turned it from interesting metaphors into nonsensical worldbuilding that adds little value and makes things needlessly confusing.
Really, so much of it - the fights, the lore, the fanservice - just feels completely without purpose. What I liked about NGE in the first place is that all of those aspects were important to the characters and story. The fights weren't just flashy robot fights, they symbolized character development. Despite it being completely ridiculous and nonsensical in-universe, Shinji and Asuka's synchronized dancing team-up is my favorite episode of Evangelion because of what it represents in the development of their relationship to each other. Operation Yashima way back in 1.0 (which is mostly a carbon copy of the anime version as-is) is the only Rebuild fight that hits anywhere close to that feeling of being more than just pointless action. In NGE, because Shinji's budding sexuality is a major focus of the story, much of the fanservice is literally just in-universe male gaze from his perspective. When the camera lingers on Misato or Asuka's boobs it's usually to highlight that that's exactly what Shinji's eyes are lingering on at the moment. 3.0+1.0 on the other hand is just FULL of gratuitous butt-shots that really don't serve any purpose. I've already talked about the lore in the above paragraph but it's much the same - in NGE the lore was mostly background fluff meant to reinforce the metaphors, whereas in the Rebuilds it actively distracted me from the story by being so fucking confusing while not actually meaning jack shit in the end.
Mari is still a big ??? for me. I don't really mind her, but the little bits revealed about her history only raise more questions than answers. Fuyutsuki calling her "Mary Iscariot" is particularly confusing, because it's framed as if it's supposed to be a big revelation but it literally means nothing to us. The current theory I'm going to go with is that she was the first Evangelion test pilot and was frozen at 14-16 during the early days of the program. I definitely feel like she would have heavily benefited from more screentime throughout the previous movies because her importance in this movie doesn't really hit the way it should since we still know so little about her agenda and motivations.