Maybe after things settle a bit further, the mangaka (Tabata) will add in some prologue chapters. He's gone through a lot of personal problems.
Allegedly, he rushed everything because a friend died and he wants to visit his other friends, but that's speculative.
I don't understand why Shonen Jump didn't give him the same amount of leeway they give Kato. Maybe because Kato (Ao no Exorcist) is a woman?

That felt kind of rushed. Anyone else agree?
I mean, sure, okay, Asta is Wizard King... I guess?
But then, what happened to:
- The -actual- king?
- Asta's father?
- The Asta / Astaroth connection?
- The sister (nun)? [sort of, half-assed answered?]
I'm sure there's more loose ends. There's a lot of things still left unaccounted for.
Especially the Asta/Astaroth thing, for me anyway.
I suppose we must assume that the name was just *conveniently* similar.
If Tabata was given looser deadlines, like the ones enjoyed by Katō, maybe the final arc wouldn't have fallen so flat.
Oh well. ( ̄ε(# ̄)Σ