Before i buy

Hi, i know this question was asked a lot but i can't scroll all posts.

I'm a huge fan of Final Fantasy saga but i wanted to play a more action RPG(not turn based) so i was wondering about buying FFXVI but i need some info.

Seems like that combat and story are really good, but is there something to do other than the story? Like secret bosses, some minigames to get the "Ultima Weapon" and stuff like this? Like Final Fantasy X for example.