Yeah it did that but what people liked about it wasn't that it was final fantasy, what people liked about it was that it was yet another vast (although empty) open world fantasy game which is very popular and it certainly did have some good and interesting ideas... It's just that almost all of those good and interesting ideas are from games that aren't Final Fantasy.
It certainly LOOKS like Final Fantasy from the various monster designs like Behemoth, Bombs, and other things like the Summons, Chocobos, ect, but take all of those away and could you really even call it Final Fantasy? The story doesn't hold up, the gameplay doesn't hold up, the open world doesn't hold up, nothing in the game really feels like Final Fantasy.
Now you can try and argue 'That could be applied to any of the games!' but no thats not really correct. If you do the same and apply it to most of the good games you don't have that problem because you have an enriching story, and interesting and well planned out world, great combat with unique gameplay systems, and characters that drive the plot forward. That is what is the 'heart' of a Final Fantasy game and its the major thing that FFXV is very much lacking.