Unfortunately, the future for this manga is, to my pessimistic expectations, very grim. The author has completely changed settings after the kingdom arc, and, especially considering the advancement of some characters (in particular, the new reincarnated girl at the end o the last volume). It's definitely a style that is betraying the original chapters of the manga and novel and it's slowly ruining everything that has been put into place.
My last sliver of hope is that this won't take the sad, toxic, cliche turn that the conventional Shounen mangas have, since it's also what ruined Gantz, which was probably the best manga ever at the start of its series and yet it managed to turn soft and misguided at the end.