It's not necessarily what's wrong with the sty;e that's making it die, it's more so the what's wrong with the game. Arcade shooters are really fun and entertaining, as are realistic shooters. CoD had small flaws that turned into big flaws then even bigger flaws due to: A. their fan base, B. how often the flaws occurred, and C. (due to A and B) people taking advantage of the flaws.