The problem is that too much to stay in Fiore, which is logical in a sense since the quest happens in the country.
But I wish there was at least 2-3 quests happening in another country and that according to what she speaks it leads the plot to something else.
For example, the first chapter where lucy almost ended up being a slave and leaving for Bosco.
In the end we never went to bosco, it's a shame, there may have been a quest on that, girls were kidnapped, we learn what became slaves in bosco.
As a result, the Natsu team goes to Bosco, Lucy and Erza are captured and play slaves, they destroy the slave trade, free the girls and return.
But when searching through the files, erza see that one of the clients was once the zeref sect guys from the paradise tower and like that his launches the plot around erza's past.
Or as in movie 2 they are on a mission to another country sent by the king.
His could have started the plot around END and his dangerousness.
For the world's danger, ANK must have been the ultimate enemy who decides to destroy the world, or acno who is tired of waiting and decides to destroy neighboring countries and that the information is transmitted in Fiore.
Or else it could have been END the ultimate enemy because natsu has succumbed to darkness and is "" "dead" "and it is END who has control.
He goes into the ruins of tartaros and awakens another demon and builds up a small army with them + those of the zeref sect.
It was a possibility