First of all is the fragmentation of his story, potentially the best FF ruined by a cluster of ideas that they tried to merge together as best as they could; the result is a good product anyway, so compliments are needed to the all team: it wasn't so easy...
Second, and this is about pc version only, a not very well (at this time) optimization of high-end hardware: I was not really happy to have to download at least 80+ GB to play, nor to see that with a 1070 setting a resolution of 200% I can very well keep the 60 fps during the play and in the kinematics, but I suffer a visual jerky in the animated scenes. I hope this is a problem that can be solved with future updates, given that this is a major flaw.
Now we come to the merits.
I must say that for someone like me, fond of the old turn-based combat system, it's not always easy to be able to please me a very lively fight: this was one of the reasons that made me hate both FFXII and XIII and their awful battle system; FFXV fully succeeds in its task in my opinion, making the player entertain both through the projections and the invocations themselves, being frenetic, compelling and that stimulates the player to continually improve the concatenation of the attacks, to favor team play and maximize the damage : a good compromise between Devil May Cry and Persona.
A point really in favor of the game is the creation of spells: not only can we create different combinations through assimilated sources and various objects that will give special effects depending on the combination, but during the fight the most powerful spells can easily cause damage to the area , very different from previous FFs where the damage would have had effect only on the single target.
Another positive note is represented by the growth system, a bit limiting in personalizing your character, but still interesting considering the affinity between the level increase and the actual need to acquire skill points to improve your skills (resistance, offensive capacity, etc.). As far as I'm concerned, perfection in this field was achieved by FFX, where it was possible to customize each parameter through the spherography, but this task in FFXV is absolved by the equipment, so nothing to say.
Another positive note is given by the hunts, secondary ones already appreciated by the old FFXII and that are always welcome.
Finally it is a game that offers many hours of fun, breathtaking graphics, enchanting scenery and an exciting storyline, worthy of what Square has always flaunted in his masterpieces, not to mention the wonderful work done in characterization of the characters.
Definitely recommended, both to veteran FF fans and to those approaching for the first time. That's a pity, however, with a little more effort could be the best FF ever made.