#2 Set piece prowess; Dangerous early crossing
With the injury to Cazorla, Arsenal's indirect set piece duties have mostly been allotted to Mesut Ozil. With the uncertainty surrounding his future, it would not be a bad time for Wenger to acquire a dead ball specialist.
Step forward, Thomas Lemar. With his ability to swing in a perfect set-piece with his left foot, the incoming Alexandre Lacazette would be cherishing the prospect of linking up with Thomas Lemar. Not just with set-pieces, Lemar has an uncanny tendency to swing in extremely dangerous early crosses rather than dribble all the way to the byline.
This would suit Arsenal's newfound counter attacking prowess to the core, and midfield runners like Ramsey will have plenty of deliveries to latch on to.
Also Read: Why isn't Mesut Ozil's future at Arsenal being discussed amidst the Alexis Sanchez saga?