This is not a debate. They had the guy for a year. If he was anything special, he would have played over Nick Foles. Not to mention they wouldn't have traded what they traded to get Jared Goff if Sean Mannion is that guy. They see him in practice every day.
I assume you think Brett Hundley is a world beater because of his preseason highlights and play...
Rarely will I state things this bluntly, but you're flat wrong.
Mannion got no development time because Fisher dithered over whether to keep Austin Davis or Keenum as the backup to Foles and as such there just wasn't any reps for a fourth QB.
So saying that Mannion would have played over Foles if he were any good is beyond ignorant both of circumstance and of Fisher's history of not developing QBs, something that's been a hot topic around here for a while now.
Feel free to have a opinion about Mannion, but deviating outside known reality will be stated as such.
All we have from them really is unrealized potential. Now we can endlessly debate ceilings and floors and factors which can synergize a person's actualization of their potential...and that's books worth of information... But we don't KNOW.
Personally, I like that in the face of significant organizational neglect, Mannion worked his butt off in the offseason to get better and it showed in the preseason games.
I think Fisher was predisposed to Keenum so much so that he would have traded away Mannion. Said it many times. Now that Fisher is gone, I think the org wants to see what they have in Mannion. And if Goff is still in the concussion protocol, it's a moot point. Plus, Keenum looked awful his last stint. Mannion is gonna look worse than Keenum???