They cannot jump the shark and go to space like COD. Battlefield, unlike COD, has always been known for its realism. They have never been about crazier, faster or just flat out absurd. The Bad Company series gave us destructible environments that solidified it as the goto franchise in the FPS genre.
Sure Dice has made some mistakes in the past. I mean did anyone really like that Cops and Robbers thing they called Hardline? What about when they removed the ability to easily squad up with your friends in BF3? Companies make mistakes, but the best companies learn from those mistakes. I have faith that DICE is ready to bring the Battlefield franchise back to the glory days of Bad Company and when they do, I'll be ready!