Are Progression Levels just new name for Training Zones?

[Scheherazade]

This post might answer part of your question; the progression levels are within the training zones.

Introducing Adaptive Training!

Every workout in the catalog now has a detailed difficulty ranking, and is also included in specific sub-progressions within each training plan. So your ability to complete workouts does not directly influence what the next workout you’ll receive will be. Instead, the workouts you complete determine your Progression Level for that energy system, and then within your training plan each workout is chosen to match your progression level, within the context of the specific difficulty/workout type yo…