Jennings has no ceiling. It's only a floor. Now why they couldn't see that in spring training is quite bothersome. I assume Les demanded that Jennings be the starter and Cam had to abide. Alternatively, if Cam thought Jennings was our best option, then Cam is not the QB guru he was made out to be, so the answer to your question in that regard would be yes.
What hope do those three or four guys with 1x jerseys have of ever playing a down outside an Ebola pandemic?