Even if I wasn't fond of James Olsen's character, I must admit that his exit was rather sweet and true to the character he was supposed to be :intelligent, kind, caring, selfless, brave and moral (a bit too much patronising for my taste -> cf to his little speech about the possession and use of firearms by civilians and even DEO agents in s3
, among other things), with an urge to help people in any way possible => so, no senate run (while he was so wary of everything that turn around politics and politicians), just going back home to stand up and fight for everything he’s fought for in the past (what offers to producers the possibility to call Mehcad Brooks later to say a finale goodbye when the show will stop and even before if necessary, right?! ). That being said, returning to Calvintown after decades spent in big cities like Metropolis and National City, where the style and standard of living were very different from where he came from, taking again the reindeers of the local newspaper with the intention of using the power of the press to take on the corrupt political machine running and re-instil justice, respect in the town, with the help of his superheroic alter-ego the Gardian to act as" the Shield of Justice" if necessary, is highly disillusing but well, he can always dream!

Indeed, I remind you that most of the time, journalists from big to modest newspapers/magazines who tried to condemn publicly the uses of certain influential people in town were killed (cf to the 80 journalists who were killed in 2018 in real life) or if lucky, had to put the key under the door and be forced to leave with their families so much the said corruption intrinsically linked politicians, police, justice and even medias.
Of course, James Olsen can always count on Superman and Supergirl but, they will not be able to protect him from everything and all the time, especially if Metroplis or National City is under attack. As for the Guardian, we saw that he wasn't invulnerable, especially when he faced alone an dangerous alien.
For the rest:
- Lena Luthor: this character is really complex: while giving the impression of sinking more and more, in the same time, it is like there is a fine rope attached to her waist which holds her to the precipice edge and prevents her from falling completly, body and soul.
(A charitable act that would compensate for the harm she is about to do? => I note that she hasn’t, technically, hurt anyone in the process of conducting her research ... yet.)
I note too that she keeps acting as effective and empathic (I don't think she pretends her concern about J'onn's situation or Brainy's behaviour) as before but in the same time, she takes advantage of these opportunities to be in DEO HQ in middle of the band to keep an eye on people she considered as her good friends and material she can afterwards, borrow or steal for her personal use.
I really don't know where this storyline will go but it needs to stop quickly (maybe things will be resolved in the Crisis or just after), because in continuing to treat Lena as the Lex twin, it will be very difficult to return to a "normal" situation between Kara and her, even if Kara managed to save Lena's soul in time.
- Kara and William: So, the guy isn't as bad as Kara (and us) thought and way doing, they will surely have to work together to knock down Andrea Rojas/the Leviathan and eventually become friends but sorry, William as Kara's new love interest.NO, especially if this lovestory only lasts until the end of the season. I want to see Kara Danvers focusing on being a reporter, being Supergirl, and spending comfortable time with her family and friends.
- Kelly Olsen: even if I don't like her romantic association with Alex Danvers (again where is the chemistry between both actresses?), she becoming an instrumental part of the team and her new connection to Malefic, making her invaluable element is nice... and that change from her brother!

.
- Lena and Brainy : Interesting duet. They have an understanding of each other that isn’t shared by anyone else. The intelligence levels of Lena and Brainy isolate them a little from the rest of the world because they think about things much differently than anyone else does, and beat themselves up even worse when there is a problem they can’t figure out. And when these two come together and create a solution, magic happens!

It was also the case with Lena & Winn. I can't wait to see him returning to National City!
- Alex Danvers: is it me or since she took charge of the DEO, we haven’t really seen her actually be in charge. She barks her orders to her agents and clashes a lot with J'onn, Kara, Brainy over how to handle a situation... but at the end, she remains in background. What is her story even supposed to be about this season?
- J'onn and Malefic: the conflict is interesting but the treatment is boring. Wonder what will be Malefic's role in Crisis IF he has one.