I'd go with that he has had games where he has looked good but he frustrates because he seems to lack confidence to do what you know he can do. Redmond is like the other side of the coin to Boufal.
Boufal had so much confidence he wants to take people on even when its not the best option. Redmond, onfor the other hand, seems to lack the confidence to take someone on ,even though he can, and opts for the safe pass.