I've ALWAYS tought about a Natsu/E.N.D. turn evil Arc in the original series. It would have been placed before fight against Zeref and maybe there could have been a lot of character development and also between the relationship about the two Dragneel brothers(and Nalu of corse) but it didn't happen. After that arc would have been so more much sense into Natsu with demon/dragon new powers defeating Acnologia...epic! Instead of this shitty ending we got. I really hope Natsu turnin evil and much more character development. The idea of Touka manipulating Natsu even with kiss or sexuality meaning would be awesome. But it is a shonen... I lost my hope in those kind of thing from a long time thanks to Mashima. Fairy Tail at his beginning was really more singular and crazy, with no fears and unconventional.﻿

Also:

1) Why the f**k Acnologia never heard or fought with those Dragon Gods.

2) There is no development in characters

3) Dialogues and actions are confuse.

4) The main series already ended time ago, still no got any NaLu.

5) How is possible Igneel never told to have a son, a son who's so powerful and who's slayin people and entire cities.

I wish it be 1 ch. a week and that Mashima could improve the plot but I don't think so.﻿