I appreciate your view on gaming, but i think its fair to say its one that is falling out of favour.
For better or worse, we're living in an age of increasing sophistication. And, when it comes to gaming, that includes storytelling as well as graphics and gameplay. More and more gamers demand solid, crafted storylines to accompany the visuals and derring-do.
There is room for simplicity, but it's the current trend for multiplayer to feature the simple stuff, ie run 'n' kill. I'd argue that problems (with ACM?) aren't the developers trying to overcomplicate things, but rather showing their lack of talent and overreaching themselves.