You can compare the pay to win level to Hearthstone. A collectable card game will always have this in its gameplay because they can't give you a play for free option.
Got stuck in deck creation
After previewing the Cow card that's in your starting card pool, I got stuck in the deckbuilding. I could move the filters around but could not add any cards to my deck or leave the deckbuilder. Had to alt+f4 out.