One week ago when I did my first mock also noticed about 20 picks were underclassman. We actually agree on 9 picks while needs in most other cases match up there is a difference in ranking.
He seems to focus on broad needs of teams over specific player profiles who fit teams character & scheme not to mention changing of HC & staffs. Then he pulls a couple shockers out of the hat
for kicks I guess.
I feel ahead of him at this point but that could change when he actually does a little more research