Feel like he’d replace Bernard in that between the lines clever, no. 10 playmaker role that he played (literally that 1 time).
But coming in from the right instead of the left allowing Richarlison to play off the left where he’s more comfortable and also adding goals.
Most importantly it would give us options of different types of player when required.
Bernard - Strong link up with Digne, likes to cut in and get involved in shorter passing, sharp movement and the ability to create space in tight areas.
Richarlison - Direct, powerful, wants the ball in the box and infront of goal.
Rodriguez - Clever on the ball and can pick a pass.
Walcott - more of an old fashioned winger wants to go down the line.
Iwobi - I honestly cant say what his strong points are. Not a massive fan, seems to be great and awful at everything...
Siggurdson - direct central midfielder, wants to get space infront of goal, not as mobile but a threat going forward, can obviously drop deeper too.
I count that as the following positions being covered in total;
AML - 3 players can play there
AMR - 3 players can play there
AMC - 3/4 players can play there.
All of whom would offer different things. Naturally Walcott would be first replaced going forward, along with Siggy.