Let's be honest here: Rick Spielman would be an improvement over this coach with total control bull****. In fact, he was back in 2004 but the extremely poor coaching got him re-demoted and then eventually he was canned.
Pioli sounds fine with me if he can be gotten. If not, hire the best guy available. I doubt it's Randy Mueller, but I'm okay with it if he's the only guy on the market.
If Pioli is a possibility, Wayne should consider Tom Heckert Jr. He has ties to this organization and is in the same situation Pioli is in -- he's GM by title but does not have control.