No not really. Those that defend the game will say it is but it honestly isn't. The year has been great at releasing new games that did what FFXV wanted to do but a lot better, from Horizon to Square's own Nier Automata.
I'm gonna eventually replay FFXV down the line with all the patches and DLC and hope it comes close to what I hoped it would have been, because it was not too long ago where this game was the game I wanted most in my life.
What are you on about?
The game sold more than 6 million copies, of course it's a good business decision to make DLCs for it.