Moos and Frost ain't going anywhere. Who would they get to replace them after they've gone full dumpster fire mode? nebraska's picks from the litter are getting fewer and fewer every year.
Barta isn't even reotely part the reason for Iowa's successes. That's like saying a security guard was responsible for preventing a bank robbery when no one tried to rob it in the first place.
Wrestling? He lucked into having the 2 best head coaches in the United States, both Iowa alumni, both with international championships and Olympic medals, one with Team USA head coaching experience, both wanting to come coach here. A 2 year old could make that hire.
Football? Gimme a break. The reason we had the successes we've had is because of the stability of two football coaches in the last 41 years, and recruiters who find hidden talent, none of whom were hired by Farta. Woods, Parker, Morgan, and so on might be under Barta on paper, but we know who really found them and hired them.
Basketball? Nope. If you think Gary Barta is out there finding basketball coaches on his own and making hires I don't know what to tell you. Iowa is like every other big sports program...the major donors influence that stuff and their money is what decides who gets the job. Which is why nebraska is in the shit sandwich they're in. Because their big donors are all old money from the 70s and 80s who want the glory days back and throw money at the program like complete idiots and can't see the forest for the trees.
You want an example of an AD who's in charge of his sports programs and calls shots? Barry Alvarez. He's got experience playing and coaching, and he knows what it takes to have success so he and his donor base know how to get it done. Farta is just another Fredo from The Godfather who walks around fucking everything up...but people keep tolerating him because somebody has to go to I-Club events and he's a good one to go on camera and be the whipping boy when things go south.