Ok, let's talk about some of controversial things in the movie. John Connor death haven't bothered me as much but it sure felt distasteful especially if you see the movie as direct sequel to Judgment Day. And more importantly, I struggle to see the point of it if we get John Connor stand-in anyway
The same goes for Legion. What's the point of it if it's basically Skynet ?
Carl on the other hand is among things I've liked. Logical problems aside, I find idea of Terminator turning good because of its necessity to have point for its existence pretty fascinating even though it was basically an excuse to have a good T-800 once again. I don't mind seeing Arnold in Terminator movie again though and think Dark Fate didn't try to force him upon me right from the start like Genysis did - "Oh look - It's Arnold from first Terminator ! Oh look - It's older Arnold! Oh look - it's even more older Arnold! ". He still had bits of Genysis sense of humour but I found it more appropriate here:
Spoiler
I liked the tension between him and Sarah. The parts where she remembered that she actually lost her son were well done. But parts where she was just acting badass were not so much
Rev-9 even though was basically same idea as T-X from third one at least wasn't bad John Connor from Genysis that was screaming "Look at me and what a great CGI do I have! " whenever he was on screen. He wasn't over the top villain and reminded me much more of T-1000. He was very human like or very cold and calculated depending on situation which is appreciated. And, believe it or not, when Genysis was coming out and I was going through my Terminator obssesion phase, I've came up with the idea of Terminator being able to separate into solid one and fluid one. I was 14 back then
The other two characters were not as memorable. Especially John Connor stand-in. Especially in future scenes. I don't find her terribly convincing as savior of humanity. AND IT'S NOT BECAUSE SHE'S A WOMAN but because you don't turn people on your side by saying "Machines want us fighting each other so we shouldn't"