I mean, I love Neuromancer, but whilst it's evocative writing, the characters aren't written all that well. Molly is just, like... there. And saying the trilogy is better than Asimov, who was old-fashioned in terms of gender when Neuromancer came out, and Snow Crash which has some dodgy scenes with women...
That said, I do think the Bridge Trilogy is some fascinating writing, if a little dense at times.
Both characters are damaged, physically and psychologically, by technology. The distance and coldness between them exemplifies that. But it's their relationship that humanizes both, incompletely but still so. Ultimately though, the characters are still subject to the dehumanizing nature of the world they live in and so their relationship never progresses much.
Beyond that, the book is fairly strictly limited to the main character's experience. So you don't learn much about other characters beyond his thoughts (which are, again, those of someone horribly psychologically scarred).
That's sort of the point: both the wonders and perils of a world driven by computer technology and the effects that world has on people.
It's been a long while since I read Neuromancer, but that's sort of the gist of those two character's relationship, from what I recall. It's convenient and good for both of them, but ultimately they're both very damaged and unequipped, emotionally or psychologically, to carry on a deeper relationship than that. Which is something the book does talk about, IIRC
