For fear as being lambasted for being optimistic, it sounds as if for once we are organized - 1st choice was Mbappe but we move on to back up plan either in parallel cause we know we don't have great chances or we know Mbappe is not coming. Maybe we did learn our lesson.
On Lacazette specifically, if we retain Ozil and Sanchez I think he'll be a good fit. He has the qualities that Wellbeck has in terms of pace and workrate, but can actually make intelligent runs and score.