I just don't like that mechanic. I use it when I build garrisons for example since there is no alternative, but otherwise, I generally don't. (but the AI sure does)When I read your tutorial, I realized that you don’t use strategic redeployment, maybe to make things a little harder (even if it’s not always the case) but even in peace and/or on your own territory you don’t use it. Why?
It also seems to me that you forgot to say from when or must strengthen his troops to 100% (mi-38 I suppose ?) because I thought to strengthen them early 39 to attack mi-39 (as "historically" in fact) but I was surprised by the Shelling of Bretten event where the German DoW me (he had asked for reparations in addition to apologies and I refused) so that my troops were not 100% reinforced at that time (although it went well afterwards) On the other hand, German had a huge dissent, in the 30% (I took a look at the save to see it, even if I suspected it, since its non-national provinces like Malta had a 35% chance of rebellion) which made things easier.
I think I did make a comment about not reinforcing until fairly late in the game to save supply IC cost and then announced when I started to do so once I thought it likely I'd be fighting Germany in short order. Yes, just after the Bretten event I started reinforcement and posted the slider settings. I don't see much point in doing so before that while waiting too long can be risky (especially if those divisions are holding the forts along the border) though it is still winnable as you said. The only time I'd say you should reinforce immediately is if you want to fight an early war with Germany. Doing so in 1936 is especially fun since there is no time to increase the size of the mobile forces and it is thus harder to pull off large encirclements. That said, the French army is still big enough to stand its ground in 36.
Germany does not always get huge dissent. The right decisions can fix the problem, though a player can bring it down much faster of course.