IMO - Frances armed forces in the spring of 1940 were a lost cause, there's just too much they would have to change too quickly to make a difference to the OTL outcome.
But I wonder, what plausible changes could they have been with other of the Allies, to make a difference to the German Blitzkrieg?
And 'difference' will be greater German losses, delaying the French capitulation, and/or lower Non-Allied losses.