Arcs are long? What?
The first arcs till the Fighting Festival were no longer than 8-10 episodes. Then the arcs did get longer during Oracion Seis and Edolas arc and got to about 20 episodes. And I will admit that those two arcs did start to drag. But then Tenrou Island arc came, longer than the previous two but it never felt that it dragged. Maybe because that was just because I found Tenrou Island arc to be completely boss. Then the Grand Magical Game arc is just starting, but it looks like it's also gonna be a long one as well, we'll just have to see where it goes and hopefully it doesn't drag on. I think the arcs are just getting longer because there is something huge impacting on the story. Like Oracion Seis was the first main Dark Guild defeated, Edolas had to introduce a whole new world and parallel dimension versions of the characters that was a really cool idea. And then Tenrou was where Zerf made himself known as well as a lot of other stuff.
Also, I'm not an expert on the Big 3 anime since I've only watched Bleach beforehand, and that anime had arcs that were way longer than Fairy Tail's longer arcs.
Anyway, tangent over. Although I hugely enjoy Fairy Tail it's really an anime I watch for a laugh and a good time. It's no where near my top favourite anime but I still really enjoy myself, which is why I guess is that the issues I have with it don't bother me that much as other people might.
What I don't like about Fairy Tail is when Natsu steals the spotlight because he is the main character and he has to. I don't mean that I hate the fact that Natsu is the one to beat the final boss. But when he takes the glory from another character, the biggest example was when he punched Deliora, yes it's said that it Deliora was already dead, but come on! He stole the spotlight away from Grey and Ur.
I don't mind the nakama power ups, because fairy tail's main theme is the importance of friendship.
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But the ending to the Erza vs Azuma was bull and did set the fight back from being great. It seemed really forced and it would have been more effective if Erza just said something like "I can't lose, my friends are relying on me" without the visual aid of the guild's faces.
A little thing that annoys me is the character's "Power Levels". This isn't the show's fault entirely, in fact I'll be fine with it but I just get really annoyed when everyone is saying that Natsu is the strongest character. And although it was a good fight, Natsu fought Jellal way too early in the series. I have a feeling that he is one of the strongest characters in the show, but for some reason people think that Natsu is stronger because he beat him. Declining the fact that he had a temporary power, temporary being the key word, and he was injured before from the fight with Erza.
There are also some minor announces, such as the wasted potential with Lisanna. I'm not sure if she will ever have an importance to the story in the future, but she could bring something out of both the NatsuXLucy and the NatsuXLisanna shippers. I think it just gets to me because her story made me cry, but she is doing literally nothing now, like I don't think Natsu has even spoken to her yet.