You need to research this more before you make statements like:
2. While oversigning is slightly restricted and monitored in the B10, it is not banned. In fact it is possible that Saban could have signed most, if not all of his classes at Alabama under the B10 rule.
From an SI article
The Big Ten has no issue with oversigning because it banned the practice in 1956. The conference actually loosened its rule in 2002 to allow schools to oversign by three players, but even that rule is drastically different from the NCAA rule now in effect. According to Big Ten associate commissioner Chad Hawley, schools are allowed three over the 85-man limit, not the annual 25-man limit. If, for example, Michigan ends a season with 20 open scholarship spots, then Michigan may sign 23 players. No more.