I still have my pre-order and it is cool for the Square teams that the game has so good reviews but when I see a "general agreement" about a RPG with a story filled with plot holes and a lot of tedious side quests it feels... weird to see so many 8 & 9s? I hope the good stuff is really good to make us forgive where the game fails.
For Gamekult, you also have to keep in mind that for them 6 is not bad, it is honest. A 6 is a good game worth having in your collection but misses elements for it being on the podium (I am paraphrasing their own website: http://www.gamekult.com/apropos/notes.html). I can get it is not everyone cup of tea and a lof game I love to death are 6 for them (Life Is Strange, Firewatch and Transistor) but the text will always be more important than the grade. The reviewer explain his point of view (which is nothing more than his opinion) well enough for me. Seems like Eurogamer agrees with them.
In the end, the real review will be up by Friday or this week end when a lot of people will have play / finish the game. I guess with FF XV, there is a honeymoon phase due to the wait where everything is nice at first :)