Sherman took over an 8-8 team that lost discipline under Ray Rhodes and helped rebuild it up to 12-4 at its peak under Sherman. Sherman convinced Ron Wolf to trade for Ahman Green who helped replace the aging Dorsey Levens. Sherman liked Ahman during his one year as an O-coordinator in Seattle, while Holmgren didn't like Ahman. The Packers were rebuilding Sherman's first year with 2 rookie Tackles on the offensive line, and a young Ahman replacing Dorsey Levens.
Sherman made a number of bad draft choices when he got the GM title after Wolf left, but he also helped develop a competitive team. In my opinion the domino that set the Packers slide in motion was when at their peak at 12-4, Sherman overpayed for former Pro Bowler defensive end Joe Johnson from the Saints. Sherman thought Johnson was the missing piece to get the Packers over the hump and into the Super Bowl. It didn't work out though. Johnson was usually hurt or fat and slow from the big contract he got. Johnson hurt the Packers in both his subpar play, and the fact that his huge contract put the Packers against the salary cap. They couldn't afford to sign any decent replacements for Johnson or other areas after that because his signing bonus was still counting towards the cap. That signing more than anything started the slide for the Packers in my opinion. A lot of Packer fans blame Sherman for the Johnson signing, but I don't. Sherman had a small window to try and take a shot at a Super Bowl while Favre was still playing at a high level. Sherman took a shot and it didn't work out. It mortgaged the Packers' future somewhat, but I don't blame him because I think if you ever feel you might have a shot at a Super Bowl, you gotta take it.
There might be better candidates out there, but I don't think Sherman is a bad one. Sherman is very loyal and hard working. He's not enamored with his own ego like Buddy Ryan or Dennis Green. The one thing that intrigues me about the Cardinals possibly hiring Sherman is he might have a better chance to convince Bidwill senior to make some changes in the organization for the better than any other candidate would. Other candidates might be better game day coaches, be better at "X's" and "O's", or show more fire in front of his players. But if there is a coach that can get Bidwill senior to get his organization up to speed with the other organizations, I think that might be more important to me than what the head coach does on the sidelines during a game. With Shermans non-stop work ethic, and his loyalty to the organization he works for, I'd be intrigued to see if that would impress the Bidwills to the point where he could get in Bidwills' ear to make some changes for the better for the Cardinals organization.