Erza is honestly a terrible character, her magic quickly became useless, she wins due to excess bs, she practically has no real power level, she is just reconnected so she can win a fight, conveniently now she uses other people's magic to help her fights, As it is never clear why to make Erza so used, since Jellal's defeat she has had nothing to do with villains to be honest, she has never had any interest in Zeref (in fact I think she never saw him) or the demons of Zeref, she had nothing to do with Acnologia, spending time to make her look good in her battles is strange, in fact I hope more to see her totally humiliated without the right to win something at least in one arc because of how boring she has become, it's a shame because I liked the designs before but now I prefer a big break from her.
Everything about Irene is ridiculous and forced, inventor of dragon slayer magic, supposedly on August's level who came out of nowhere, Erza's mother due to the fact that Erza didn't have any plot for the last arc of Fairy Tail, and serve as an excuse for Wendy to be easily useful.
Wendy should never have been part of the main team to begin with, there was already a dragon slayer, another was not necessary.
Brandish, nothing about her is interesting and she only lived to give hype to the Spriggans.
I didn't put him because he was my favorite in the start, but Natsu is becoming like this, since Alvarez he has gotten worse and worse, I don't care about his fights anymore, I'm really waiting for him to get a horrible defeats without being able to get rematch, defeats that really affects him in some way, because he really needs something to make him change, because it seems like he has no personality actually.
Selene, really the idea of using the dragon theme again was bad and lazy (honestly it never worked at all), this mission should have been something else, not something to ensure and justify Natsu's relevance, but Selene is really one of the worse, his continuous appearances and reconnections are silly.
Aldoron because the whole arc was a waste, which was the one that caused the biggest problems if there was anything to save from this sequel.
Juvia forcing her in this manga is too annoying, there was no need for her to actually appear since this is a Team Natsu mission in fact the same goes for the rest of the Fairy Tail members.
A little Acnologia only because by forcing him as the final villain, without really the plot being fully built for that, was something part of what ruined the last arc.