The point that Rutgers has a better football past then ISU is debatable as hell. First the most games they ever won in a conference is 5-2, and that is in the Big East. Since joining the Big 10, the most conference games they have won is 3.
The problem with looking at historical records is you have to also factor in what conference you played, not just wins and losses. WV would be a great example of that, they like Rutgers has seen their win total drop since leaving the Big East and playing in a higher rated conference. Schiano best season at Rutgers was 2006 they went 11-2 overall, 5-3 in the Big East and played 2 ranked teams the entire season.
Rutgers will be improved, their recruiting is going up, but they will always struggle with wins just because of the teams in their division.