I think there is very little to chose between Salak and Murphy who are both streets ahead of Lua Lua except in his ability to run down the line at pace, with or without the ball.
That would be well worth a try as he has a good right foot on him and AK was wasted in the No 10 roll. Could be tried in the game v Reading or during the game at Burton if .SB is not available.
His major weakness is his inability to go past players outside of them he has to stop and cut back inside of the full back as opposed to either Knockaert, March or Lua Lua.