Vernon Adams is a fantastic college quarterback. However, I don't think that will transfer to the NFL and the scouts know it.
People want to make Russell Wilson comparisons, but the only things they have in common are height and scramble to throw ability. Russell Wilson has a thick build, is much faster, very intelligent, big hands, and has an injury prevention potion. Vernon Adams cramps during the hard games, has been injured several times in college, is very thin framed, and is 40 times were unimpressive.
I don't think Vernon will be drafted, because there is no team that could reasonably expect him to develop into a full time starter. His body just isn't made for it. If he does get drafted, it will be only because the QB market is dry, not because he is going to emerge in the NFL.
There will be a lot of teams willing to give him a shot in free agency. As a matter of fact, I expect the Seahawks to try to bring him into camp. Free Agency is where he will get his shot.