Could very well change it.
If Amiens goes, the BEF's supply system is crippled. Even in quiet periods this required about 140 trains per day, and for strategic operations this requirement rose to 212. If Amiens were lost, Haig's staff estimated that the best which could be managed was 90 per day.
During the Michael offensive, plans were drawn up for the loss of Amiens. The entire BEF was to be withdrawn south of the Somme, with 85% of its supplies having to be destroyed in place. IOW, even if the plan could be carried out (it was drawn up very late in the day) the BEF would have to be re-equipped virtually from scratch. While this was going on the French Army would be essentially fighting alone. So unless the AEF can enter the line a lot sooner than OTL, the French would be lucky to survive.
See Ch 4 of T Zabecki - The German 1918 Offensives. It's pretty much the definitive work on this subject.