This looks a lot like Octopath Traveler for Nintendo Switch if you've played that - Minus the ability to walk around worlds Octopath has similar to Pokemon. You should check that game out if you haven't heard of it. Basically turn based too with up to 8 players on your team. Might download this sometime.
I plan on getting Octopath one day, once the price drops a bit that is. But yeah, they are similar gameplay though I'm pretty sure Granblue has been going on longer, plus it was anime and a PS4 spin off game.
Yeah I did think $59.99 was sort of a rip off. Only reason I bought it is because it reminded me of Pokemon with a more competitive vibe.
It wasn't worth the $60? I heard it was a large game, so what made it not worth the full amount? Granted I be happy to pay it but I don't have that kind of money to throw around.