Here's my problem with Barkley and Nassib, I don't see either one of them as any better then Jackson or Kolb. Both TJ and KK are average QBs -- they have their own unique strengths and weaknesses, but neither is head-and-shoulders above the other.
And Barkley and Nassib are just like them, both will be average NFL QBs, they have their good things, balanced out by their limitations. Neither one has the skills and/or athletic ability of last year's QB crop (Luck, RG3, Wilson). Nor do I think either one has much upside, what see is what you get. And in my opinion, what you see is very underwhelming. Both have some good attributes, but neither screams greatness, or potential greatness???
So I've said it before, and I'll say it again, I see only one QB in this draft with real star potential. There is one QB with a gun for an arm, with athleticism and foot speed, and with that "it" leadership factor: EJ Manuel.
Buddy, do what you can to get him! As for the others, if you can't get EJ, then take what's available in the 2nd if you think you need (although I would wait to the 3rd or later; that is, if you really feel you need a developmental QB that badly), but neither of these two is a noticeable upgrade in what you already have (or had in Ftiz), so why waste a high pic on them?