To expand on this…
There are a LOT more detail in this, but my general thought is:
New rider with lots of FTP growth room = Keep pushing up FTP and higher wattages
Experienced rider who’s closer to their FTP ceiling = Extend the TIZ and push it out.
And then…
If you’re in the specialty phase, always push to the higher levels.
These are like fine-tuning things but it would be a nice enhancement.