As of now, Uta is indeed alive. The story hasn't depicted anything otherwise. Maybe there'll be changes in the future, but for now, Uta's part in the manga continues with them being alive.
One great Mio x Minna fanfiction could be 'The Unlikely Bond'. It beautifully portrays their friendship evolving into a deeper understanding. In this story, they face challenges together on the battlefield and off, which really showcases their characters well.
Well, one idea could be to focus on a new character, let's call her Mei. Mei has just joined the Strike Witches and is initially shy around Minna. But as they go on missions together, they start to bond. Mei discovers Minna's leadership skills and Minna sees Mei's potential. They face a tough enemy that requires them to combine their unique abilities, like Minna's strategic planning and Mei's speed. In the end, they become great friends and a powerful duo in the Strike Witches team.
Well, 'Mio x Minna: A New Beginning' is also quite good. This fanfic delves deep into how their relationship might start and develop. It has great character development and the story line is very well - thought - out. The author does an excellent job of capturing the essence of both Mio and Minna, making it a must - read for fans of this pairing.
You can try fanfic websites like Archive of Our Own (AO3). It has a large collection of various fanfics, and you're likely to find some great Mio x Minna ones there.
Common themes in 'gom x kuroko minna fanfic' may include growth. The characters might be shown growing both as individuals and as a team. There could also be themes of loyalty, where they stick together through various challenges. Additionally, some fanfics might explore the backstories of the characters more deeply, which is a theme that helps to further develop the characters and their relationships.