I would probably agree that PV likely won't include JLew in the 18 for the reasons you list above. However, I do think JLew with less training with the team has more to offer than Khiry though..
Also, and again, sorry if I have missed this elsewhere, do we know what Camargo's status is?
The only thought of putting Khiry above JLew is that Khiry provides height on crosses while on the attack (see his goal off his shoulder last season vs. DC) rather than set pieces (Chanot would fill in for that). I'd say we see JLew in the 18 next game. Though there's the consideration we want to keep his GA status for next year so putting him in less matches would help that case.
Camargo is not listed in the injury report so we have to think he's healthy (as of when it was written) to play.