YOu can't play the game completely out of the core box because you cannot build decks with 3x all cards.
So your game experience is limited.
This is surely obvious; you don't get 3x every card so you do not have all the options you might want to build a deck you want.
Of course you can play the game out of the box. The word completely in your first sentence feels a little misdirected. I feel my experience with the core set is complete. Clearly, you feel you can't.
Your third sentence I get. I understand that someone might feel a little frustrated by FFG's decision.
I am so excited by this game. It's AWESOME. Clearly I don't personally feel impeded by this distrubution method (I own one core set). That said, all I want are more cards - as in, more expansions - and I am very excited to see the new cycle be released throughout the course of the next few months.
I want FFG to recognise that the game is loved and enjoyed, that people are willing to part with their hard-earned cash to play and support it. Looking through the product lists of the other LCGs (of which, I have experienced none), I can only hope that A:NR achieves the same number of add-ons.
All this negativity, it won't change how FFG distro the core set. Let's focus on letting them know that we love the product, and hope, that as loyal customers and fans, we will be treated fairly as we go forwards.