I didn't play Bravely Default though, but I read about it and found the battle mechanic interesting.
Something I wanted to mention but forgot in my original post: When I was fighting the final boss, he says that attacking him was making him stronger, and I was like "Yeah that's a bit silly. He could just order his minions to fight him to make him stronger". And then he says he would transform into his final form, and I went "IT HAS TO BE A --------!". And he transformed and I went "YEEEESSS". hahahah :D
Edit: Removed spoiler :)