Deliberate Practice in TRPGs

Finding and setting up Deliberate Practice in anything one does is a mindset I've recently adopted. So far I've identified opportunities for deliberate practice in the GM's domain. These are:

Player Scenes.
When I break down games, I break them down to scenes. As scenes its easier to limit the variables to create opportunities for deliberate practice.
Metrics: 
1) Time to communicate,
2) effectiveness of communication (the player's feedback or watching recordings of such sessions),
3) How quickly one plans all the Scenes needed to achieve an X effect or push the story in a particular direction. this is a time metric along with a results or output metric.
4) breaking down and Identifying key elements a scene should have based on the circumstance. Being able to quickly identify the key element that moves the player and pushes the story. Metric is rating the Scene by how well it pushes the story forward. A simple QA rating of X/5 and trying to get better and better.
Feedback:
1) In player feedback,
2) watching rehersals, mirrors,
3) Discipline or Will or Dedication to go back to notes or recorded sessions to look and critique.

Ideating Player Options.
This exercise is basically thinking up the hardest options a player may give to the GM. This is a slow and deliberate skill which takes a lot of documentation, rehersal,  a solid set of problem solving abilities and process or logistical skills.
Metrics:
1) How many and quickly can the GM think up about his key Story thesis.
2) How quickly he can identify and track all the times players have stumped him. The measurable element is how quickly the GM will capture and document hard choices he has to make for review.
3) How many can he correctly predict player choices. Simple measure of how often the GM gets it right. But it can also measure in bounds (how many steps ahead can the GM predict based on how strongly he knows his players)
Feedback. 
1) How the game progresses, this is a prediction and how often it is correct becomes a form of feedback.

Preparation is Deepwork.
Writing out the Game, the plan, the characters, and the NPCs is one of the first elements we can always track and is the most basic.
Metrics
1) Elements Created. How many locations, NPCs, scenarios, scenes, plot hooks, and motivations can be made in a sessions of concentration in 4 hours straight.
2) Algorithms Created. More sophisticated than Elements are formulas to make improvised elements that can serve to push the story and the players forward.
3) How we budget our time in each elements. Measuring how we use our time to make fluff, elements, contingencies, study the players and their characters etc... How systematic one approaches this is measured in datapoints,  and the checklists and guides one creates, as well as the revisions one makes (and documentations). As well as the experimentation we make.
Feedback. 
1) How much of the stuff is used vs how much is unused.
2) Rating how useful what was prepared.
3) Post Prep Feedback, our own estimation, vs How the player feedback. Always get player feedback or someone else's feedback. The more we delay it or avoid it, the more we undermine our commitment to be better and learn. I know we can take only so much humbling criticism, but growing ability to take feedback is always a useful trait.

If you know of any I've missed or some suggestions I'm open.