Hey, told you I would end up responding to this at some point ;)
First, I want to say I agree with pretty much everything you said about comics!Nuala. I was never fond of this storyline tbh, for reasons I'll explain later, but I also agree with you that comics!Nuala is generally misunderstood, first by the fans, and I'd dare say, by the show writers as well (or why would they have changed her story so much?).
Even after rewatching The Sandman for the... I don't even know, I still can't quite come to terms with Girlboss Nuala. Don't get me wrong, I love season 2 despite its flaws, and I actually liked this character a lot thanks to Anne Skelly, who was truly delightful, but I still can't see a reason why she was made a warrior. I mean, I may be stupid, but I don't see what it brought to the story in the end... She didn't accomplish more being a girlboss type of woman than she did in the comics, did she? Sure, it was glorious to see her chop Lyta's head off, apparently just in time to save Morpheus' life, but it didn't, because he WANTED to die and chose to even while he probably felt that Lyta was dead. Even the "let's build an army and a big wall to protect the Dreaming" seemed a bit contrived, because everyone should have known that it would have been useless against the Fates. So, I guess I just fail to see the point of this plot, and it may be my fault. You won't see me screaming "bad writing!"... I just don't get it.
One thing I loved, however, is that they changed her to make her at least as much in love with the Dreaming as she was with Morpheus. And I say "at least as much" because, unlike most viewers, I know, I found her feelings towards HIM more ambiguous than they were in the comics. If I didn't know that Nuala was in love with Morpheus in the comics, I wouldn't have necessarily believed that she was in love with him in the show. I saw admiration. I saw a woman who was fangirling over Dream because of the way she had seen him handling his situationship with Titania centuries ago, and for the way he had repaired what was broken between their realms. But I didn't necessarily see romantic love. Please don't throw rocks at me, I'm a person who often mistakes romantic cues as friendliness even in real life, so my judgment is probably not the best lol, but that's how I felt about show!Nuala anyway.
The irony is that I would have understood more if show!Nuala had been explicitly in love with Morpheus as she was in the comics... My problem with the comics was never that Nuala was portrayed as a young woman in love with Dream, because there's nothing wrong or anti-feminist for a woman to romantically love a man; but I never managed to grasp *why* she felt that way for him. He was generally aloof and distant with her as he was with, well, most people. I didn't see them share any special moment like they did in the show... What was it in him that she fell in love with? It was the big question mark for me.
And one last thing... I'm not a fan of making Titania the villain who called Morpheus. On one hand, I was relieved they did that because there was no doubt Nuala would have gotten all the hate that Titania received for calling Dream into her realm. On the other hand, I thought it took away from her character to portray her as a flawless character who didn't make a single bad decision, even if in her case it would have been for a good reason and would have come from a place of love, whether romantic or not. I must say it made things easy: Titania was already an unsympathetic character, so why not make her even worse by rendering her responsible for Morpheus' demise? But that's the thing: it seemed TOO easy to me. Comics!Nuala was, as you say, stronger than she seemed, but her love for Morpheus weakened her just like Morpheus' love for his son weakened him; it wasn't a flaw, but it gave them complexity, and it caused them to make irreparable mistakes, as so does love, very often.
Love caused Morpheus' demise because, without this love, he understandably lost the wish to live. Nuala, on the other hand, seemed to have become stronger thanks to it, in the end. She found the strength to acknowledge she couldn't live in Faerie anymore, because she couldn't keep pretending to be the person Titania and her brother wanted her to be. She felt terribly guilty for what she did, but she didn't let this guilt eat her alive like it did for Morpheus, and she went on to find herself at last and live her own life, on her own terms. They both paralleled each other in that they were both reborn at the end of the story, the difference being that Nuala didn't have to die to manage it. In the show, we lost this...
She had no difficulties cutting her ties with Faerie because, apparently, she hated the place for a long time, even before Titania gifted her to Dream. She said that she agreed to return there with Cluracan only so she could get help to save the Dreaming, so it wasn't even her broken heart or a form of weird attachment to a place she knew she didn't belong in that convinced her. And so, we lost this parallel with Morpheus!Dream. Again, I liked show!Nuala very much, but I think it was a miss.
I hope it doesn't make me sound like a hater... I love this show, and I'm grateful that we got a beautiful 2nd season, with a perfect cast for every character.