It was development though. For the first time in her life she had someone back her up as she used her authority while her husband was gone. She proceeded to stand her ground when she was PERSONALLY attacked. That takes a lot of courage when you have your disability mocked in front of many people. (You have no idea how humiliating it is to have a condition you have to deal with made fun of in front of a room full of people who don't know you.)
If anything I think she has evolved nicely. She went from believing she was unworthy of her position and feeling petrified that husband would reject her because she was a "defect." (Something her father kept saying AND abused her for it.) She has openly admitted her flaws and asked for help so she can navigate her position properly without being taken advantage of. She embraced everything she had to learn because she knew it was now her duty to run the house and land in her husband's stead. Everything she had to learn was VERY difficult given she had never really been given lessons for anything. (She had no idea about how money worked or anything until she was educated on it.)
Given the time frame all of this is taking I would say her progression is going very well. It doesn't matter if she has a stammer or not at this point. She has a land of people who have accepted her and her "odd" way of speaking and do not mention it. They simply treat her like another person. - Something she has NEVER had in her entire life.
So she did shine. She flexed that wonderful new spine.
If this had gone with her doing everything perfectly now I would pretty much drop this because it is still way too early for her to shine since she has only JUST managed to learn about running things properly. It would be ridiculous to expect her to know how to defend the land right now.
I understand, however there is still no thematic reward for her hard work. Her development isn't being used to progress the plot and that in a narrative point is unsatisfying. So far it's only been used for character growth, which is fun, but a good story would allow her to impact the narrative. I'm sure she'll have more times to move the plot on her own, but considering how much build up was given, I was expecting the solution not to end up being 'I need my strong husband to save me'. They could've used her problem-solving skills which they already established with the Tree arc, and I think that would've been more impactful.
I would even have preferred if she offered a solution, the knight guy still gets mad and attacks her, and only then does the ML show up. I just think it would've showcased her growth better and also be less cliche. It shows she can't solve every solution, while also highlighting what she's good at and what she's learned.
However, I know this story is more of a romance than a character story. So I get why the author would rather bring the ML now so they can develop the relationship which has been stagnant. Though I honestly do prefer the story when the ML isn't here, the FL doesn't get to express herself as freely as when she's on her own.
damn, was really hoping to see the FL shine. They've been showing her grow for a couple of chapters only to be saved by her husband is kinda disappointing. not saying she has to be perfect, but seeing some thematic pay off for her work would be satisfying.