The show had some of the best character development I've seen in a long time, if ever. It's not just 1 character either, it's almost all of them to various degree, and all of it EXTREMELY natural and organic. Nothing really comes out of left field and you ask yourself why did someone act a certain way, it always make sense.
The final scene was just so good, Vi spends the entire trying to first protect and then save Powder only to realize that Powder doesn't exist anymore. Silco telling Jinx she's perfect the way she is. Jinx realizing she can't be the Powder Vi is looking for, and that it's ok to be herself(thanks to Silco) and then just embracing being Jinx and blowing shit up. It was just so rewarding as a viewer.
As popular as the show is, I find it sad that people are dismissing it because it's animated, or because it's based on a video game. It's so good it's transcend genres.
A bit unrelated but worth mentioning, one of the great thing about Arcane compared to many shows is that I feel it doesn't assume the audience is retarded. It doesn't bore you with too much exposition, and trying to oversimplify things. I feel it assumes that people are smart enough to figure shit out that's not thrown in their face, or will ask question of friends, or look online to clarify something that might not be totally obvious.
It's annoying being taken for idiots that cannot fill holes and put things together without always being beaten over the head with them.
I need to stop gushing over how much I love this show.