Mechanics wise, it is somewhat odd they put so much depth into the mechanics of a game without really a ton of Super bosses or end game content/PVP.

Now whether you care about end game or not, it's not really the main discussion. But between things like element shifting and bringing over more of the bingo stuff, it is very odd there isn't really anything to use min-maxed monsters on.

The elder dragons aren't really crazy tough enough to really warrant going to the extreme with.

People are going to say that its a single player RPG. But even games like SMT and Digimon Time stranger had things to use your maxed out mons on.

Hell Digimon had a whole ass New game+ where all the enemies stats got maxed out JUST SO you could use your maxed out digimon.

Even SMTV had Godborne for the exact same thing. (Though NG+ is kind of more important to SMT series due to all the different endings)

To be fair I also recognize that a New game+ for stories 3 might involve a bit more work to see what does and doesn't carry over ect. Due to the habitat restoration system and certain side quest and poogies.