The Arsenal manager says reducing up to 60 roles is necessary to keep the club moving forward, but the timing alongside his own new contract has drawn scrutiny.
Two sides level on three points meet at Parc Olympique Lyonnais on Thursday as Lyon host Crystal Palace in the UEFA Europa League League Stage.
Second-half goals from Timber, Eze and Saka swept Arsenal past a stubborn Lille side who had kept them at bay for an hour.
