Hi @joeyarnoldvn,
well we count @steemmonsters as a browser game with 2D graphics. And yes 3D is more complex than 2D but there is no need to explore the whole 2D ecosystem at first before getting into 3D. This is mainly the preference of the game developer who is developing the game. We decided on 3D graphics as this is a more immersive experience than 2D (that is not say that 2D cannot be immersive, on the contrary!).
I have not played Steem Monsters, so I was not totally sure. But that is good. Right, I understand the differences between 2D and 3D can be a difference between gaming style.