I think they can get "solid" replacements but I don't know why maybe I am reading too much into the recruiting hype but I think Delano Hill could be a great addition to this team. Heck maybe he sticks with Iowa and doesn't pan out, he could be a Jordan Bernstine with injuries or he could be a Nico Law and struggle with pass coverage.
This is what I hate about recruiting, I think too many people get way to over hyped about players. You seem a little more level-headed about imcoming recruits/commits. Me on the other hand, I see these highlight films and read what the scouts say and get way to excited that they are going to be program changers.
Plus for me I love offense and putting up points but I love to follow defensive recruiting more because Iowa is known for defense and I can't wait for the defense to get back on track and return to it's dominating ways.