I'd argue its almost inevitable. Plan XVII was controversial to begin with. The essential error the French made was that they didn't think the Germans would use their reservists in the front line. The French thought the Germans had about twenty five fewer divisions than they did. When Joffre ordered the attack through the Ardennes, he believed that there would be only a small screening force that would be overrun quickly not two armies.
The increase in German army strength would be obvious and Plan XVII's hopelessness clear even to the most ardent fans of the offensive
But that's not how it worked OTL.
Plan XV of 1903 assumed the German would attack thru Belgium, and that the French response would be:
1. Move into Belgium for a meeting engagement with the Germans
2.??
3. Send the Bosche scurrying back and On. To. Berlin., winning the War
Plan XVI wasn't all that different, except Michel wanting an Army to be held back, if the Germans tried sneaking thru the Ardennes or something else sneaky, given how the Germans were improving interior RR lines, then do what XV did, just from a different location further south. But waiting for the Germans in French Territory? Heresy. So he had to resign.
Plan XVII of 1911, Joffre got the three years of active service so the troops could work on more close order drills, while rear area jobs/work would now be done by called up reservists, and free up more of the active service men to be part of the attack. The number of men in each company increased. Alsace and Lorraine were to be the main focus, along with Plan XV going into Belgium.
This was done even though the French had a good idea of of what the German Schlieffen Plan was from spies.
As long as additional troops were not being put down around Metz in new defensive works, you would see no change in Plan XVII