I've read that there is no team morale aspect.
Your megalomaniac control of a team has no impact on how the team plays... Your expectations affect basically nothing because there is no incentive to run a team correctly in all honesty.
I think I will have one save file of Owner Mode where I am the Bills or Jags but stick to coaching and hope that the presence of Owner Mode means that I can get a new contract offered or mounting fan pressure for my firing or the firing of other coaches.
I also hope that the interview elements that are present for the Owner Mode are also there for Players and Coaches.