I find the popularity of RedZone to be bizarre; you're not watching football any more, you're watching a live version of sportscenter. If you don't find the games entertaining enough to watch, why do you want to follow the sport at all?
It's definitely a different experience that immersing yourself in one game and loses some of that richness, but to say RedZone is just like Sportscenter indicates you're not really familiar with either.
The deep, tense, complicated, sophisticated overtime tie game the Cardinals and Seahawks played last Sunday was among the very best games of the past year but would have had near zero profile on Red Zone.