Foles is not the long term answer. Even if next year we need a starter you are still a long way away from winning a SB. The offense simply won't run and the faith lost in the front office and coaching staff will be too much to overcome.
This year really relies on an all in dependency on Trubisky to perform. Nick could step in, that doesn't guarantee he can duplicate his success like in Philly. Remember Wentz was an MVP candidate and the Eagles were hot without Foles. He took over an already hot offense. Not the case here with the playcalling or the players.
I like the idea of signing and trading for Foles before the season to force a QB battle and if Foles was who we decided to go with I'd have been upset that we moved on but accepted that Trubisky isn't the guy. Let's face it if Mitch goes downhill at this point and is benched you are drafting a QB anyways. You are already committed to your defense financially and you have tons of teams with young QBs in their system that they believe can be the guy moving forward.
Last year the RG was a huge problem, LT was a huge problem, TE was historically bad, the WRs outside of Robinson looked inexperienced and out of sync with the offense. This year, Mooney, Robinson, and Miller all look to be contributing like a normal NFL offense. Graham had more impact or as much impact in this 1st game as out entire TE room did last year in all 16 games. Ifedi looked promising, Leno while not elite looked much improved,
Mitch, regardless of critics threw about 4 balls the entire game that were poorly thrown. Outside of that, he threw catchable balls and in a few circumstances got screwed by nothing he was in control of or could have controlled.
If you are going to sign Robinson you have to get rid of Foles or commit to him next year. It's a tough decision. But it's one you can't afford not to make. You sign a cheap QB and if Mitch goes down, you play with a shitty backup, cut mitch, and look to the draft and take the better pick and use it to find a QB.