I have not seen anything to indicate that Hill is a late-round talent. There may have been some draft pundits who had him down as one, but a few years ago, they also had Travis Frederick as a third-rounder.
Value is always debatable, along with whether any other team would have taken the player that high. Here's what one draft site had to say about Hill's value:
Also, it was pretty clear during the draft that he was who we wanted to take in the second round, so Dallas' attention was squarely on him just like it was on LVE in the first round the previous year.