I mean, it's nice and all but I can't help but feel that all of this is just too easy. Elf lady was the Commander before Lienna, so there would have been many within the order who would have been there for a while. Hell Lienna and her cohorts learned under her, so how did the order devolves this much because of one guy?
Also where are his higher-ups at this point? Like sure, corrupt nobles and whatnot (even though that never came up in the story so far) but their country got attacked, some of their best got wiped out and the Commander is still missing, that one guy (who is the highest ranked so far presumably) was about to just bail to another country but no one above him is around to even just take stock of what happened? Elf lady can just take charge again?
And I'm sorry but the more they keep piling on how OP Lienna is, the less her treatment within the order makes sense, especially when the former Commander (legendary Elf lady who has been Commander many times over centuries) endorsed her, her cohort of knights all like her and her subordinates are really fond of her, even recruits like Miguel like her, Lily thinks it's absurd that she got desk duty, everyone but one sleazy guy like and respect her but they all stood by and let her be abused for years, to the point that the outlook is that no one within the order likes or respects her. That's absurd and it completely goes against the setup of the story.
I cannot take Lienna seriously as someone who is this flippant about things. Yes, Amon saved Lily but he doesn't know what's going out there either and he has no investment in Ardia, but Lienna does. There is a lot of sensible middle ground between killing her there and then (I doubt anyone reasonable would want that) and just forgiving and forgetting while offering her a place within the order. It would be extremely lame if the other knights just accept her as well because Lienna did. She wasn't there when she was leading the charge massacring soldier and civilian both.
The fact that she got disposed off by her own country (reminder that it was because she was overzealous about killing Ardian troops, they could have left as soon as Evil Amon said so and she would have been fine) is used as a sob story to justify that she isn't really evil, her country is. And I guess we really don't care about the other subordinate who got beheaded huh? I'm sure Lily told Lienna all about how she was treated by her military organization but not what she specifically did. Is she really cool with someone who attacked and killed many of her comrades and the citizens she is meant to protect while she was not there, because she spent a few days with her and decided she is a nice person because she confessed her guilt? And she swore to do the same thing but on your side, so that's cool?
The more we go, the more it feels like the author wants to take the story somewhere other than where it was intended at first so all the setups and early events are kind of inconvenient and we are trying to navigate around them or retcon them where we can't. Also it's been a while since we last saw Amon and the whole setup of the life within the stomach of the dragon feels inconsequential at this point given how much more important stuff is going on outside.