...I'm gonna get my ass killed if I ever do a genuine deep dive for it, but gotta say:
No, Nobara was never a particularly well-written girl character.
She had her moments, to be sure. Like in the Origin of Obedience Arc, and part of her death (the flashback part has some serious issues, mainly in regards to its timing¹, but the 'chairs' part of the scene is The Good Shit™).
But like. She was always noticeably bereft of plot threads/things to do, particularly in comparison to Megumi and Satoru. Hell, she gets thrown out of most battles she's in, to the point that Megumi comments on it during OfO:
Her argument with Nishimiya is a travesty, to the point that I don't even want to go over it outside of a deep dive.
Her admiration of Maki is one of the few cool things about her character, but it's not a particularly emphasized or, uhhhh, 'revolutionary' thing. Sure ain't no Utena, lmao.
I like Nobara! But she was always playing fifth-fiddle to Megumi, had few unique interactions with Gojo-sensei, and mainly acted as a support to Yuji (she literally dies in part to further traumatize Yuji in and out of universe, lmao). Hell, you can make the argument that she was having minor hints to getting romantically involved with Yuji before her death.
This isn't to pit Nobara fans against Megumi fans, Yuji fans, or even Satoru fans; but like, I was so flabbergasted when I read up to 145 initially, 'cause...well-written girls and women? Where??? Maki and Mai were the closest, and barely fleshed-out, all the same.
My hot take: Nobara was NEVER better-written or designed than Haruno Sakura (manga, Studio Pierrot fucked her over).
¹Something similar happened with Nanami almost dying to Mahito, but since he survives that and continues to have story presence, it isn't as big of an issue. It's definitely worth comparing, though.