Well I'm not as high on the concept of passing in football as everyone else, so to me, no, there shouldn't be guys wide open everywhere. Passes are high degree of difficulty plays and there are capable defenses out there trained to stop them.
But no, other than Brown, Iowa wouldn't be considered all that talented at receiver.
Also, the refs were allowing ISU a decent amount of contact in their man coverage.
Also, the offense is still learning a new system. There are inevitable growing pains that come with coaching changes.
Lastly, although Iowa had some big runs, they never committed to pounding on the D with the run in the first half. This allowed the ISU D to be more fresh to get pressure and disrupt some timing.
Establish the run, and then I can see where a guy should be wide open here and there