Below the surface he's the savior of the world and he'll get super powers and a magical sword.
But yeah, this game seems to be playing it straight for the most part. And looking at the characters, the story/world background, and the developer comments on what they're going for with this game, I wouldn't say this is all unintentional either.
They've usually been pretty honest when they say they're trying something that deviates from the status quo a bit, so when they say they're trying to dial things back to the SNES/PS1 era of JRPGs where the series started, I don't feel like they're saying something unbelievable. There's some "2013 interpretations of the 90s" stuff going on of course, but otherwise Zestiria seems a lot like the kind of JRPG you'd see back then to me (which would probably come across as really generic and typical by now, and it does, looking at some of the comments in this thread). One could make a good argument that it's not the best direction to be going in, but maybe if the execution isn't too bad...