I think the anime did the best it reasonably could with the 12 episode limitation. And there are some great additions. I miss when seasons were 24-26 episodes. Having only 12 episodes to tell a story hurts so many adaptations, especially light novels which are paced in big book-sized chunks.
There's nothing to simply "talk it out". This isn't a case of miscommunication. They all know what's at stake. Talking doesn't change the fact Anis is the only heir left, or that the line of succession has to continue, or that she has negative capital with the nobility because of her lack of...
This side of Aki I really like exploring. Honestly a lot of her actions are more sympathetic when you remember she's only embraced this new sex as an opportunity to express feelings she's had badly repressed for a long time.
Yurina was the whole reason Hinata wanted to be a man. Now knowing that she doesn't care about him being manly (s)he's ready to try being a girl. This is good character development.
But I'm off the Yurina x Hinata ship after this fake out. I'd rather Hina get with Aki. This secret has been...
I really wanted the girl the sister eloped with to be Kenji. (Well I guess it's technically possible since the ending is ambiguous. )
I like this author but a lot of their works feel like the ending is missing