Foles looks bad to me at least. More INTs this preseason then all of last season
He'll be fine. You need to keep in mind that teams have more film on the Eagles and that Foles is going to tuck it and run during the regular season. He's not going to tuck and run in the preseason and risk an injury.
I don't think he is any great talent, but he's a great fit for that offense and I expect them to dominate the NFC East this season. They might hang 100 total points on the Cowboys in those 2 games.