I think there is every chance for Foles to improve given this will be his first Season as the unquestioned starter throughout camp and leading into the season. Another season to learn Chips book and for Chip to hone his craft at this level. Subtract Desean, but add Sproles + whoever they draft at WR. Lots of variables, but I've seen no indication, other than the inexplicable Dallas game, that Foles rattles under pressure. Lets say for the sake of argument that he neither improves nor digresses. The only difference is that he plays a full boat this year. Based on his performance last year, he'd end with a stat line of:
4,203 pass yards/40 TD's/3 ints; 327 rush yards/4 TD's/3 fumbles...in my league, which penalizes -2 for fumbles and ints, thats 494 FFP's. Manning's historic year resulted in 596, Brees came in second with 503 and Rivers rounded out the top three with 410. FWIW, Luck totaled 381 FFP's.
I don't care about who's situation is better. I care about production. Andy Dalton and Matt Stafford finished 4 and 5 last year ahead of Cam and Luck. Does anyone think that without AJ Green and Calvin those guys would be viable FF starters? I do not, but I don't care-I just know they put numbers up.
Bold prediction: If Foles stays healthy and plays all 16, he will finish top 3 FF QB next year.