Photo realism isn't the problem with GOT. Horribly bad playfield art is the problem. Bad playfield art = no time, thought, or imagination spent on creating something that flows and you want to look at again and again (just as the game code should flow and be something you want to play again and again).
Alien is photo realism and looks great. GOT looks like what a playfield would look like if you asked me to do it. I work in banking for a reason.