The problem, IMO, is Jones himself. He recently stated that this year was the best GM job he's ever done. Every interview, I get the impression its his way or the highway and there's no inbetween nor comprimise. Also, a recently released player (the name escapes me) stated the Cowboys' room is upset and micromanaged and there was no comradely between players and coaches. The man's definetely a great business man... but considering how the NFL has evolved over the years, its time to pass the torch to someone else.
He's getting up there in age.. so retire Jerry! Sit back, relax and enjoy what you built.
Cheers, K