I've spoken with the FTL authors and red their website (I read French currently)
Some crucial points about the FTL (sorry I can't read the entire 17 pages of this thread)
1- Reynaud grows a spine after the FTL authors got ride of two toxic personalities that poisoned his will OTL (and kept De Gaulle at arm length) Helene de Portes and Paul de Villelume. They put the two into a car and crashed it *early* June (for De Portes, it is merely a change from OTL: she died in a car wreck LATE june OTL, with Reynaud the driver).
2 - De Gaulle and Pétain face each other circa June 13, with all the French politicians of the era around them. De Gaulle carries the day, Pétain is so angered he blow an aneurysm and died on 7, September 1940 (he can't be evacuated to AFN in his shape, so it is Laval and his cronies that bury him... in Verdun, with all the poilus of 1917-18)
3 - Reynaud sticks as chief of the government and order the fight for the Métropole to continue, although it lost. Whatever weapon, tanks, gun, aircraft in the depots is thrown into the battle - even utterly obsolete, it will get sacrificed to slow down the German juggernault. and it works: Banyuls (near the Spanish border, on the Mediterranean side) falls on August 7, 1940. The Germans lost 67 000 men and 1500 aircrafts, BoB is a piece of cake compared to OTL.
4 - Between June 15 and August 7, happens Le Grand Déménagement. Basically: every useful thing that can be removed from France and send to Algiers... is moved. The politicians, the industry, the gold, the banks, the most modern side of the army, the government, and the kitchen sink. Aircrafts and boats transit via Corsica, which become the last bit of Métropole in the hands of Algiers (more on this later)
5 - Mussolini gets his ass thoroughly kicked everywhere in Africa. No Afrika Korps to save his soul, with a spectacular, huge butterfly compared to OTL. Basically, the fight in Africa is over by October 1940... instead of June 1943;
6 - So where does Rommel and AK goes ? to the Balkan, with Monty of course. And General Henri Giraud, obviously not a competitor to De Gaulle in this universe. But a well respected military hero. Bottom line: all the blood shed in North Africa OTL is shed instead in Greece, Albania and the Balkans. As "Albania Korps" sounds very lame, Rommel goes for "Skanderberg Korps" instead.
Meanwhile the French, British and Italian navies fight each others to death in the Mediterranean, which become a battleship, cruiser, carrier, destroyer graveyard - a giant Ironbottom Sound. Bretagne, Provence and Lorraine fights Littorio at the cost of Bretagne.
In May 1941 MN Richelieu kicks Bismarck ass in a memorable fights after poor HMS Hood suffers the same fate as OTL (and Prince of Wales is nowhere to be seen
). The Algerie heavy cruiser crushes Prinz Eugen.
7 - What happens to Corsica ? Well, Operation Merkur and its Sturmjaggers somewhat never land in Crete but... in Corsica. And in February 1941. The Italian Navy, Luftwaffe and its X Fliegerkorp prove too much for the Armée de l'Air, RAF, RN, FAA and French Navy which endure severe losses, including the brave old
Bearn aircraft carrier. The battle last a month but in the end Corsica is lost early March, and with it, the last bit of Métropole.
8 - Franco will not attack, because his country is ruined, and because he was an extremely cautious man - no Mussolini by any mean. And if Hitler wants to pull a Napoleon and attack Spain, then he will bleed himself to death on that rocky, mountainous, dry country, particularly in July and August. Only to get his ass kicked in Gibraltar from the French and British forces massed in North Africa, only... 10 miles away.
9 - Vichy France never goes to Vichy, as the entire Métropole fought against Hitler up to the Spanish border. Pétain is comatose, then died, but of course Pierre Laval is the same old moron as OTL, and his damned souls Darnand, Déat and the others. They get a NEF - New French State - in Paris, except it is a rump state ruling a scorched earth and ruins France. As per OTL, Hitler doesn't give a rats about NEF, obsessed as he is by the Soviet Union.
10 - Except that, since the Mediterranean theater explodes in his face much earlier than OTL, he has to postpone Barbarossa by 11 months, to May 17, 1942, with obvious results - the Soviets do far better and stops him a loooooong way from Stalingrad and Caucasus and Moscow.
11 - The Indochina and Thai issue: no FIC invasion in spring 1941. Still some things never change: that old, boiling up China and Pacific feud between Japan and America is still happening, Japan is still willing to deny reality and provoke the U.S juggernault. In the end Pearl Harbor happens as per OTL, but the Pacific war takes some marked different twists along the way. In a splendid irony of History, the French and Vietnamese ambush the Japanese, guess where ? in Dien-Bien-Phu, of course.
The resistance in FIC, even limited, change Singapore fate temporarily (it still falls but weeks later) and then Singapore resistance... hits Douglas McArthur immense ego head-on, and he sticks into Bataan and dies there after a nightmarish, futile resistance.
12 - 1942 is spent fighting bitterly in the Balkans, Greece (Crete never falls: Corsica sacrifice was not in vain).
13 - D-days happens much earlier, and in reverse. Normandy, June 1944 doesn't move but... take place of Dragoon as the SECOND landing... the first one happening 11 months earlier than OTL, September 6, 1943, same place as Dragoon - Southern France around Toulon and Marseille. Basicaly France own landing (OTL Dragoon) is moved forward and becomes the main effort, since france stays in the war.
14 - France has little industry in Northern Africa and by late 1941, all the military gear saved from 1940 is gone or worne out. Uncle Sam, the arsenal of democracy, fill the gap, thanks to Lend Lease. Dewoitines are replaced by Mustangs, LeO by B-25s, French B-24s fly out of Crete to smash Ploesti with RAF and USAAF help, of course. French tanks are build in Savannah, as planned before WWII.