By the end of a console's lifespan, EA always tries something different. If it works, it stays in the next edition. If it doesn't (vision passing), it's gone. In the current generation version of NCAA 07, it's the Campus Legend mode. And if you enjoy off-the-field activities, this is worth a purchase.
Actual gameplay changes are minute enough that non-hardcore fans will miss everything. Sprint and jukes are available to all players now, and it's always the same button configuration. There are significant changes in the passing game because of this. Quarterbacks can evade even a heavy blitz, which leads to some spectacular plays when timed properly.
Defenders can now get a jump on the line. If timed properly, this can be a devastating move, plowing over the defender leaving a clean line to the QB. Blocking kicks is actually possible now, and there's the addition of the analog kicking system, which leaves plenty of room for error on even the short chip shots. After pulling back on the stick to set power, you'll need to quickly slam it forward (hopefully straight) to set the direction.
The overall play feels tighter and more refined as well. It's a little harder to get caught on the line, holes open up wider, and tackling has serious impact behind it. There are still collision problems (nothing is more frustrating than being stuck on a lineman during a run), but there are obviously steps being taken to eliminate this typical football video game issue.
On the side of gameplay modes, Campus Legend is the key way to play outside of standard dynasty play. Here you'll live a student athlete's life. This includes taking part in practices, attending "social events" (getting drunk would have caused ESRB problems, most likely), and studying. Yes, actual studying for actual tests. Your major can be in a number of categories, and you'll need to spend your time wisely.