You have 175+ hours of game play. And not all of that time was spent on making what we are seeing. I don't understand why people think that designing a game is so simple. They probably didn't even start creating the game for a long time. Laying out story arcs, creating the history and lore, developing characters, creating characters and classes. Then creating the game engine. Then creating a game world and testing. Then finally begin creating content and balancing. Then testing.