Based on what I have seen and heard from Nick Foles so far, a metamorphosis may be taking place. Listening to Foles' presser today, I get the distinct feeling he is trying to get Nagy to open up his ironclad grip on the playbook and playcalling. At one point today, he alluded to "other coaches" who let him call the plays when he felt he was on a roll and had the defense on its heels. This can only refer to Doug Pederson or John Defilipo. Certainly megalomaniac Chip Kelly would never have let him call plays, and neither would that weird OC in ST Louis.
If Nagy loosens the reigns and begins listening to Foles, he may have a chance to develop into a decent play caller. But based on games I have watched, he is not in the same league as Doug Pederson or Frank Reich. He claims he's listening to everyone around him, but on the field, I see no evidence of it. Foles animated exchange with Nagy last Thursday tells me we still have a "king has no clothes" situation. No one wants to confront Nagy on his self destructive play calling and game management tendencies. That he stopped a productive uptempo series to send in HIS play, tells me he feels like he must be at the center of the offense no matter how counter productive that may be.
Hopefully, Foles is the one who opens his eyes and makes Nagy realize he isn't the offensive genius he thinks he is, and 2018 was a fluke that took the league exactly one year to figure out.
If you'll notice, it's been a long time since we've seen defensive players on offense, two QBs in the backfield and other gimic plays that worked in 2018. NAgy has been like a one hit wonder on the top 40 charts. If he wants to turn into a legit act with staying power, he better start listening to those around him, and that starts with the SB MVP.