This is a very low-data response.......but where I would care about it, it gets much more efficient anyway.........when you're putting out more power.
All those metrics aren't as "efficient" when you're at anything below a decent tempo. There and above it improves.
I've also noticed the little metrics improve as overall power has gone up. As in, more efficient at XXX+XXw now versus XXXw a few years back.
For some reason it seems that if I use ERG mode for those 3min and 8min intervals that the body tries to find the most efficient range of motion so you can survive the sets.