The reality is that Pops is not even an NBA 4 - his size is more like an NBA 3. His skill set just does not project well to the NBA, given his size. He doesn't have much of a short to medium range game. Not a good ball handler. Look at today's NBA -- Jared Jeffries at 6'11" is playing the 2 spot for the Wizards. I think Hall has a better chance because he projects well as an NBA 3 - good shooter, rebounder, defender, passer. He could sneak in the second round and make a team.
Pops clearly has been playing much better - don't know if it was the bad ankle healing or nerves about showing well for the scouts. I love Pops, but ultimately I see him playing in Europe.