I don't know if I will keep playing this. I am not actually sure if I am having fun, or just enjoying the satisfaction of unlocking things...
Hey, if you get satisfaction from unlocking things, you'll enjoy this game for a long, long, long time.
I have seen players with 10 skull coins and a maxed Sofacatro deck, but I doubt anyone can build every possible deck. And unlocking all six Champion's paizas takes many many many moons.
I'm a lot closer to "I am not sure if I am enjoying the satisfaction of unlocking things, or I am just having fun", since I mostly draft, and at this point after an 8-0 draft I can only click rares that I already have but will never max, and then I just draft again. And more importantly, no amount of upgrading things will change the draft experience. Only the ticket at 7 or 8 wins that lets me draft again has any meaning.
Hearthstone is pretty similar in terms of me hardly unlocking everything when I finish an arena run, although I know in five years War of Omens will probably be gone and any card I've collected on Hearthstone will probably stick around, so it's a slightly more valuable prize. But War of Omens has game mechanics I find interesting, and it's harder to play an entire game without misplaying at least once, and a biggie, the amount of time you get to take your turn is actually related to how much time it ought to take you to think. I need reddit just to make Hearthstone tolerable with the number of people roping to decide whether they want to play Zombie Chow or nothing turn 1.
Mark my words, and bet me 40$, the developer that realizes they should make a limited-oriented card game with a functional f2p model will make half as much money as the guys that realized they should make a 5v5 oriented RTS with a functional f2p model. Which is a lot of money.