The author uses the interpretation that Shiho disowns Miho not only because her style of tankery is incompatible with the Nishizumi way, but also so that Miho can be free to do things her own way. That, in turn, can inspire a fair amount of interpretations for her decision. Is it a difficult but necessary choice for the sake of her beliefs, in which Shiho also had Miho's interests in mind? Or is Shiho simply rationalizing a cruel decision made for the sake of expediency? There's also the question of whether it was planned in advancenote In Chapter 3, Sakai calls her out on planning to disown Miho, while in Chapter 8, Shiho claims that while she'd considered the possibility, Miho not removing Mako was the final straw, and whether Shiho would really have to disown Miho to be able to continue opposing including boys in tankery (as well as whether Shiho's purpose is even one that she should be pursuing, much less disowning her daughter over).
Although Miho never expresses such a desire in canon, the author has Maho suggest that she wanted Shiho to be proud of her, which is why she stuck with tankery until the incident that forced her to save the drowning crew.
The author believes that weaker schools like Anzio have more of an advantage against Oarai, due to having to use more cunning tactics, and stronger ones will fall more easily against Miho. This is shown by how Oarai has much more difficulty against Anzio than Saunders in this fic, even though the opposite was true in canon.
Akio. Is he one of the few brave enough to call Shiho out for her treatment of Miho, or is he a well-intentioned but ignorant hothead who butts into a situation he doesn't understand?
Funny Moments: After Masaru fires the gun for the first time in the practice battle, his team reacts in awe, with Kenji calling it "Fuckingawesome." Masaru then takes the moment to say "Except for one thing... I missed."
Moral Event Horizon: Shiho visiting Miho in the hospital only so that she can disown her is this for many viewers.
Nightmare Fuel: Akio's father's plane crashing, and exploding in a large fireball is depicted somewhat vividly. And Akio saw this all when he was five years old.
Schedule Slip: The fic hasn't been updated since October 29, 2014, and none of the author's other fics have been updated since March 15, 2015.
Most of the newcomers should have been able to get at least as much characterization as the existing secondary teams, but only Akio and Tsubasa get much time or Character Development. Among Shark Team, Senmonka's mostly defined as Akio's friend, Gunjin and Keiibin are Those Two Guys and Heishi is largely one-note comic relief. The model club also has few characteristics besides their obsession with historical accuracy.
Dalian as a whole. They're a newcomer to tankery under the tutelage of one of Shiho's students, Katsuko Hideyoshi, but it's clear that they- or at least Akane and Wancai- don't see eye to eye with Hideyoshi, to put it mildly. Unfortunately, they have hardly any Character Development before or after Oarai defeats them. The same goes for Hideyoshi herself, who had the potential to be a look at the kind of people who study at the Nishizumi school, but ends up being a clone of Shiho.
They Wasted a Perfectly Good Plot: The catalyst for Miho being disowned is her refusal to punish Mako for almost running her over. While doing so is very much in character for Miho (although she justifies it with the unusually pragmatic reason that she doesn't have anyone to replace Mako), the problem here is that Miho isn't quite as close to Mako as the rest of Anglerfish Team in canon, and in this fic, they've hardly ever interacted before or since the incident. As such, it ends up being a bit harder to see them as close enough that Miho would believe in Mako and Mako would work to make up for her mistake, and the lasting repercussions for the two's friendship aren't really explored.