Exactly, here's the thing. That's how these f2p games all end up working, and to do more would mean you would have to develop a deck on your own and think your way through an obscure and shifting meta. Nobody does that, so you see tips towards the same deck all the time
I have developed several different decks that do well. I didn't pay and I'm not leaning towards the same deck all the time. It isn't hard to do if you pay attention and understand the game.
Right, right now I have this obscure yogg saron c'thun duplication rogue that took me to rank 6 so far, nobody is playing it and they never everrrr expect the yogg. It has pretty decent survivability against rush, but hey, a good aggro warrior draw is a good aggro warrior draw. Warrior is a lot like face hunter now :/
Playing a game for how many hours get me bored. I don't usually play for long hours like that. My eyes get sore if I did.
I personally dislike such kind of games, but I appreciate the effort done with it. I barely even played it, despite the fact that the concept of Heartstone was good.