I'm excited about the Barcelona vs Napoli draw the most. It is really going to be like a Europa League final match. Until that time, I wonder if these teams both will keep a good form and boost their morale as much as possible. If we consider the current look of the teams, Barcelona are one step behind Napoli. Because they don't seem very reliable by their game. But this could change in time if they make a big effort.
I think it comes real down to whether or not the Barcelona players can get used to the fact that they are playing Europa League and not Champions League. Especially players like Jordi Alba or Pique may have a hard time to motivate themselves to give their very best as it is a brand new situation for them. Maybe it is even good that their opponent is Napoli so it doesn't feel that bad.