I think this would be long overdue. Foles should not be part of the future in Chicago. He was a mistake by Ryan Pace and it's time to correct it and rip the band-aid off.
Even if the Bears are not able to swap Foles for a late-round draft pick, the ideal move at that point would be to simply release him. I am a big believer in Trevor Siemian. He was signed by the Bears last night to a two-year deal. I honestly think he could be one of the best backup QB in the league. He showed great things for the Saints last year.