The San Francisco offense doesn't look quite the same as it did late last year, when Colin Kaepernick took over the quarterback job and led the 49ers to the Super Bowl.At that time, the Niners were playing wide-open football. The Kaepernick-to-Michael Crabtree connection was slicing up opposing secondaries, while the read-option, pistol and designed runs of Kaepernick were picking up huge chunks of yards on the ground.This year, the 49ers offense has a different, less-dynamic look.With Crabtree out and no effective wide receivers to take the pressure off Anquan Boldin – and opposing defenses intent on stopping the read option – San Francisco has had to evolve. In effect, the 49ers have gone back to the future, focusing more on traditional power-running plays since losing two games in a row early in the season.INVESTIGATIVE: Did Aldon Smith Get Star Treatment from Sheriff?Yet the change doesn't necessarily mean the 49ers aren't dangerous on offense. In fact, it's just the opposite.San Francisco's 31-17 victory over the Titans in Nashville Sunday was the fourth straight game in which the team has scored 30 or more points – all victories – in improving to 5-2...