Agree, completely Free2Play here,

When they re-open forge, I sold legendary & epic core card on day1, then bought 2 Jaguar Staff & 2 Trial of Hydra.
With the deck, I earn 2 Epic + 4 points each week.
Later on spent some GODS to buy Finnian, Oddi, all 4 magic & 4 Death DO legendary.
So far the value keep going up, and I am happy to play with those cards haha.

I believe I can buy all 26 DO legendary by just using GODS and selling weekend reward.

Free2Play? absolutely possible.