He has pace to burn
One of the biggest problems that Rangers have had over the past couple of seasons is that they can dominate games without actually creating many chances. Having possession of the ball and passing it sideways and backwards doesn’t win you games.
Gerrard knows he needs more pace in the side and that’s why he has persisted with Brandon Barker despite his lack of end product. Boufal, in contrast, would be a big upgrade and the Light Blues could use his pace to open up tightly contested matches.