Clearly you have been outside of Nebraska any further than Council Bluffs, that is not representative of Iowa. How you can even begin to compare the two states is even laughable. Nebraska compares to Oklahoma, Kansas, North Dakota, South Dakota and maybe Wyoming. Certainly not Iowa, not even close. (BTW, I apologize to the aforementioned States for the comparison, my intent was not to insult, your people are much smarter and kinder than the inbred Nebraskans).
A new OC has his own scheme and favorites. People leave teams all the time because of new OC's coming in. Also, players who are disenchanted with that Shit Hole that is Lincoln can apply to the NCAA to leave without losing eligibility or sitting out for a year.