Agreed, but saying that Foles has never been in this offense is not accurate. Maybe not the Nagy "Chicago Bears version", but he was with Nagy in Kansas City. After that he was with Doug Petersen (same offense) in Philly.
He has worked with Bill Lazor, John DiFillippo, And Matt Nagy before this year. So, don't try to paint Foles as being at a disadvantage, cause he isn't.
Foles is here to push 10. Foles is here cause he knows the offense. Foles is here as insurance. He will not see a down if Trubs plays well/ stays healthy...