For the Germans if they are willing to evacuate occupied territories, and Alsace Lorraine and mostly demilitarize and return POWs, its hard for me to believe the Allied leadership isn't going to accept that and insist on pursuing more goals, like the occupation of the Rhineland in exchange for hundreds of thousands of more casualties. OTL Germany was prostrate on November 11th, but a September 1st armistice is a different deal.
The minimum terms for the Allies have to be politically:
a) Return of Alsace Lorraine at armistice time for France (to be confirmed by later peace treaty, non negotiable, France will inist)
b) Neutralization of German navy (to be confirmed by later peace treaty, some wiggle room here, like surrendering submarines only)
c) End of German colonial aspiration, largely achieved by 1918, to be confirmed by later peace treaty, nonnegotiable, Britain will insist)
d) Limitation of German offensive military capability (negotiable wiggle room here)
An early armistice isn't going to gain Germany much, but perhaps can gain some defensive capability, like a defendable Rhine, German retains her smaller artillery, but surrenders bigger stuff (like greater than 150mm). Then she has some ability to resume the fight if the final peace treaty isn't like she wants.