I have to disagree on "barebones".
Foremost, NCAA 14 introduced the coach skill tree to the series. That feature had an extremely obvious effect on both football gameplay and recruiting, and the differences between a school with a renowned head coach and one without was readily apparent.
Additionally, NCAA 14 also streamlined recruiting and did away with the phone call system, which was tedious. The point allocation, scouting, and competitiveness of the mode really shines to me. It's easy to use and creates interesting stories, especially in a multiplayer setting. It might be a little too easy in practice for a single-player dynasty, admittedly? I've been playing Revamped a fair bit recently and I notice that CPU teams are pretty stubborn in their recruit targeting, so it's easy to scoop up guys who slip through the cracks.
Conference customization, as you alluded to, is a big reason the game has endured as long as it has.
I generally remember NCAA 14 fondly, and I'm greatly enjoying playing Revamped. Different strokes, though.