Thanks for writing in with your questions. Here are my thoughts:
1) Considering my mild ADS, is it a mistake to follow the freeride training plan this fall/winter? I’m not sure if its heavy focus on strength and ME will be counterproductive, and if I’d be better off strictly focusing on building a massive aerobic base.
For the long term and the goals you have you will be best served by fixing the ADS before adding much intensity. The Freeride plan is focused on improving downhill performance with a nod towards the uphill demands. You can customize the Freeride plan by adding more aerobic base volume to it. This will mean more time/energy in the week and it’ll be up to you to decide if you can manage that added volume.
2)The description of Mike Foote’s plan doesn’t seem to jibe with the structure laid out in the TftUA book: the plan description says “Weekly distance and vertical will start at about 50% of that event’s largest single day’s total and then progress to about 100% of that figure.” So for a 25-mile race, I’d max out at only 25 miles per week? Am I interpreting this wrong, or is this plan just not appropriate for my relatively short goal distances?
The plan summary does not do justice to the actual progressions we use to target different length events. Thanks for point out that oversight. I will edit the description accordingly. However the very first Note int he plan on Day 1 gives much more specific instructions. As related you to your question it says this:
For events around 50km in length with about 3000m in elevation, this week should contain about 80-90% of the event’s total elevation and distance.
I hope these help.