My take on your problems:
Magic is for the first time usefull in FF games. In 97% of fights in earlier FF games you never used magic, it's just full on attack, here it is wonderfully made with effects that looks amazing, it's how powerful you want it. And therefor you can make magic take down monster way higher than you, and if you like the challenge of the fight, you make less powerful magic.
The open world is the best open world I have ever seen. The sights and dungeon are amazing there are tons of stuff to do and getting from place to place with fast travel takes no time.
Hunts will automatically turn the day to night if needed.
Summons finally feels like they should. Massive and spectacular when they first decides to help you. Since magic can be over used, it cool that the summons are more random. But they have helped me when I needed it most.
I'm only at chapter 9, so can't comment on the rest of the story yet.
add the best fighting system in an RPG (I almost like it as much as Bayonetta and DMC) and for me this is just an incredible game and if you don't like it all I can say is you wrong and git good.