I agree, especially about Galibier. Tourmalet as a MTF would be great, but it would basically prevent any action before it, whereas you could have Tourmalet and a MTF starting close to the bottom of the descent. I'm talking about Tourmalet from East; if you're coming from the West, finishing the stage on top would be the best solution, as every MTF would have to be preceded by super-easy Aspin West (or Hourquette d'Ancizan, which is similarly easy).
In the case of Galibier North, the closest possible MTF would probably be Les Deux Alpes, which sucks big time. Then you have Alpe d'Huez, but you have some 45 kms from the top of the Galibier to Le Bourg d'Oisans. Also, the descent of the Galibier is techinical only for 8 kms, until the Col du Lautaret; after that, it turns into a highway, which could kill any attack.
The best MTF to follow Galibier North would probably be Col du Granon, which would make for an even more epic combo than the Izoard-Granon we got in 1986, but we know it's unlikely to see the Tour going back there.
Your stages are great, I designed some similar ones for a game I organize on a forum. The Galibier stage was basically the same, except the previous one finished on the Alpe d'Huez, and we made the stage start from Grenoble, in order to avoid a massive transfer. The result was a big loop to start the Madeleine which brought up the kms count to 254

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The Tourmalet stage was also very similar, but we followed those climbs with a MTF in Luz Ardiden.