There's a whole bunch of things I gotta say Abt act 3 that I don't have time to, but my god the SYMBOLISM, so I'm just gonna do the couple of obvious ones that stuck out to me.
In ep7 when jayce was in the pit, he broke his leg and used the design for viktors leg brace (which he knew well enough to recreate, the two likely worked on it together in the past which I love) and then painstakingly climbs out. He's in the undercity at the time.
The whole sequence, due to him wearing the leg brace, is very unsubtly a parallel to Viktors journey of metaphorically crawling his way up out of Zaun and into Piltover. Which is to be assumed as his backstory before meeting Jayce, and was probably still something he felt like he was doing his whole life.
(Also hallucinating both Mel and Viktor in the same place is very bisexual behavior Jayce. and adds to the parallels between Mel and Viktor, they're both mages that go through physical transformation this season, and whole bunch of other scene parallels)
In ep 9, during their little gay transcendence scene he basically tells Viktor he's perfect, that he admired everything about him and that his leg and his illness were never flaws etc. Last season also ended with Silco telling Jinx she's perfect.
Which I think its neat we got that happening at the end of both seasons, in a show where identity is so important, (and toward two of the main physically and mentally disabled characters specifically). Personally I loved Jayce including Viktors leg as being a part of him and therefore something he loved as well, that he never needed to feel ashamed about
Again in ep 9 at the end, when Vi is holding Jinx and Warwick over the ledge. This kinda parallels s1 act 1. (With the obvious first scene of teen and tween Vi and powder on the roof in piltover, where Powder falls but Vi is there to pull her back up)
Vi wanting to save Vander, Jinx trying to save Vi when that goes wrong. Now Jinx is hanging there with the literal weight of her dead family weighing her down, as Vi holds onto her trying to pull her up, despite the baggage being to heavy but being unable to let go. Vander so well representing the guilt and trauma she carries with her.
In the end she knows she'll pull Vi down with her too, so she forces her to let go. By stealing the hex crystal, which is what started this whole mess, but is such a jinx moment of quick thinking.
God I bawled at the end there I kept thinking they've gotta have another scene that shows maybe she didn't die, or Ekko came to save her again, but no.
I'd go into more detail cause there's just SO much about this season but I've gotta go and I'm sure someone else will cover everything. The show was just phenomenal.