These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
The revelation that God and the Tower of Babel are real comes right out of nowhere.
Ryoko translates the ancient Sumerian word 'Kadingir' in episode 10, saying it has come to mean a 'tower so high that it reaches the heavens'. The Tower of Babylon was a tower that was supposed to reach Heaven. So there was foreshadowing.
Base Breaker: Some peoples like Hibiki, while some peoples found Hibiki annoying.
Big Lipped Alligator Moment: The Training Montage in episode 9 of G. It's comes after the revealed that Miku is alive and doesn't seem to serve a real purpose compare to season one's montage to make Hibiki a better fighter.
It serves to have Genjuro and Hibiki sing the theme from Police Story.
Chris is this. Her popularity on forums and blogs was disproportionate to her appearances in the first half of the first season. It must be her Badass Adorable and Moe tendencies. Plus, those large guns.
Miku is considerably popular due to her sweet personality. She gets more than that in Season 2.
The majority of the fans who watched the first season found the sequel to be superior after a few episodes had aired, due to the increased action, an antagonist group that has been around since the beginning and most of them are developed Anti-Villain... and compounding them is the utterly depraved Dr. Ver as the Big Bad. Though this is in large part because of blatant stealing of plot elements from the well established Magical Girl Lyrical Nanoha franchise. Just about every major event and major character has a direct mirror (Frontier = Cradle, Dr. Ver = Dr. Scaglietti, etc.)
In fact, it's seen as so much better the Blu ray sales for the first volume were more than double of that of the blu-ray sales of the first season.
Foe Yay: Maria and Tsubasa in Season 2. Not only is Maria's Symphogear identical to Kanade's, their duet in the first episode is awfully suggestive, with furtive glances and both performers stroking their long, phallic microphones. Once Maria is revealed as a villain, she and Tsubasa directly oppose one another, with their fights being some of the most intense.
Within the first episode, we're shown two girls engaging in emotionally ~intimate conversation while physically sharing the top bunk of a bunk bed. By the second episode, it is implied that such is a regular occurrence for the two, even if it's not meant to last.Scratch that. They reunite and get to see the shooting stars in the end.
Miku checking out a book titled "Be Honest with Yourself". It's not that hard to figure what it's about.
Hibiki's constant glomping on a blushing Chris.
In the 2nd season opening, a naked Tsubasa and Chris hold hands.
Shirabe and Kirika bring this in the second season. Kirika is quick to comfort Shirabe when she's depressed or angry, and they even have a Shower Of Love scene in the third episode. In the fourth, Kirika even holds Shirabe in her arms.
And in the 12th episode of G, when they're fighting against each other, they have this gem of a conversation:
Shirabe: In that case, I will try even harder to stop you. I can't allow my dear Kiri-chan to be tainted any further.
Kirika: Don't call me dear! I love you even more! That's why I'm fighting to protect the world that holds the people I love!
Kirika and Shirabe: (to each other) I'm telling you that I love you!
As of the 6th episode of season 2, the Meta Guy, Yumi directly compares Hibiki to the lead of a harem anime in terms of how dense she is at realizing Miku was worried she was feeling down and had gathered their friends for an okonomiyaki party. Cue Miku looking both pleased and embarrassed.
In the second season's 7th episode, Miku has basically been acknowledged by the 2nd division as Hibiki's wife. They don't confide to Hibiki's mom or grandma of Hibiki's condition, they confide to her. Genjuro even states that she must protect Hibiki.
Moe: Hibiki and Miku definitely qualify, and Chris has her moments. And, come season 2, Kirika and Shirabe are both on the Moe bandwagon.
Moral Event Horizon: So how do you think Ver can top Fine in terms of being utterly despicable? Well, a good starter sign of skirting the line would be when he fetches Noises on passing by kids just because they were looking at him fetching Noises to US soldiers with a smile on his face. If that wasn't enough, then forcefully injecting Psycho Serum to Kirika and Shirabe and tells them to use the Swan Song (which would mean death for them) while acting like an Entitled Bastard despite their pains and dangers of getting injected with them would be him crossing the line. Kidnapping and brainwashing Miku into giving her a Symphogear form? Now that's leaping faaaar away and deeper from the horizon, accompanied with the biggest "WOO-HOO!" you can ever imagine. He's still waving and taking another leap when he sends Nastassja off to the moon, killing her, because she's trying to avert the damage he's caused, this is also the final push for Maria to finally have enough with bearing with him and deciding to kill him.
Narm: The show's detractors are prone to noting this.
Narm Charm: But, they're not too far off. And the Narm is a large part of what makes the show work.
For both tropes, special mention goes to Finé/Ryoko's Engrish.
The Scrappy: Ryoko got a lot of hate during the first season, largely for being a Psycho Lesbian. YMMV if her being Fine did anything to win her some fans.
And for season two, Maria has become one of these. She had a lot of fans during her debut episodes, but a mix of Badass Decay and Wangst seems to have gained her dislike. Again, YMMV if her actions in the season finale have her Rescued from the Scrappy Heap.