Because that's so much, from the beginning of the arc to its end, everything goes too fast.
Already with avatar, certainly he has the excuse to be a return arc of training, but Natsu who bones the god was bad, there will have to be a little more tension in this fight.
The beginning of the beginning of Alvarez, in Caracola Island it was going well rhythm.
The problem occurs after, because scripting ease Non stop:
They already arrive at the capital at the right time or makarof is on the terrace with zeref.
The Laxus team arrives right at the right time for the rescued, while they had no info on where makarof was.
The war begins, the only 2 true fight in this war, Ajeel, fake Wal (and eilleen later), the pace was also going but more after.
Lucy with her stradress they are just shown we did not see the full potential that lucy could do with it.
Or even lucy just had no fight for her in 1 vs 1, a start with Brandish but that's it.
Such ease scriptwriting, ichiya launches the apelle world and everyone is ready to fight, while we are in the middle of the night but good.
These are the final enemie but they are almost all, OS without there is a real fight.
No tension for Dimaria / cherria, Whal gets done, OS with the new Laxus attack but without explanation.
Neihart with his similar historias, while there was way to lengthen this part, with the fight of gray and others.
Bloodman / gajeel ridicules the fight.
Jacob are fighting is a little spoiled because of loss of seriousness, he will have bled very well natsu and lucy remaining invisible.
Invel / gray ridiculous too, he takes himself 3 slams he is KO, gray does not even use his Demon slayer.
Dimaria promises an atrocious death to lucy, there it is mashima who did not assume the trashy side and it becomes a joke, while he had bled jubia and erza some chapter before.
Eilleen / erza, a real fight.
And there the fact that natsu decides to remain human, is not the problem in itself, but that's what happens next for the conclusion that is wrong.
And the rest remains in this logic to go too fast.
In EZ it's the same way too fast and for 100 there are people who complained because there was 2 transitional chapter and so people complained that it was not going fast enough.
For Bleach certainly kubo was sick but his excuse not all because well before the final fight a hundred chapters or it told nothing and wasting time.
And suddenly the final fight is rush for nothing.
Naruto the same, his aurau ended with madara, but long before that Kishimoto changed the whole story of Kaguya, + the two brothers.
And so it gives a hollow character who does not speak and is empty.
Actuellemnt for Food wars it's the same everything goes too fast, we remove the explcation, the foodgasme, we turn personal like that.
In magi, there is not even a final fight.
In NNT, of course, the author made a twist with the "end", but that does not change anything for the "final" fight that there was.
And so in the final it starts to make a lot of manga acceleration on their end, while it is precisely the only Arc that should not be accelerated.
Even if admitting that Mashima was close to doing EZ, his excuse did not rush the final comabt like that.
This is the fault of him or his boss or boss who do not do their job properly.
