In those 3 years, they would have the opportunity to play traditional power conference teams almost every week, including AT HOME which does not really happen in today's college football. Saying the best they can hope for is to have Vanderbilt's level of success; that's a possibility but a pessimistic "best case scenario." They could also suck those 3 years but win the promotion/relegation game and stay up for another year or more. Who knows what happens, but at least they'd have the chance to prove themselves, something that doesn't really exist in today's college football world.
Players transferring out... How is that different from today's situation?
You would pray for easier wins but no chance at the Playoff/National Championship? First, isn't that contradicting to "this would be great for Bama because it would create an even worse lower class?" Second, I can't relate to not wanting a shot at the highest level of achievements.