Just finished the game. Overall, it was probably a 7 or 8 for me. I enjoyed playing it more at the beginning than towards the end, but that was probably my fault for not really taking advantage of the familiar system and instead just spamming magic with Oliver. I did figure out why "All-Out Defense" sucked so much for me, and it was my own dumbness (other characters were using familiars with Evade).
My biggest annoyances come from in-combat stuff. Familiars blocking each other from attacking because they keep running into each other. Buffs being cast on you making you stop running so the enemy gets right up in your face. Spell casts/item uses not counting because the enemy used a trick while the animation was going on.
The story was decent, I enjoyed it well enough. It didn't really grab me like Xenoblade did where I just couldn't stop playing, though. And it would have been nice if Fi Drippy would stop reminding me that this person has a Broken Heart and hey, I have spells to fix that. I may take a look at some of the post-clear stuff, but I doubt I'll take the time to 100% the game or anything. Oh well, done in time for Fire Emblem!