The best option is for UCI is to collect statistics for the next 12 months and standardise the wheel size for Pro and Elite riders using the sample size as per average Athlete height and final speed+time... = Different wheel size = different categories and they should not mix up wheel sizes on the same category to be fair to everyone...
In the case of enduro:
If you competee: The same as previous...
If you don't compete: 27.5 = more agile = more fun for every heights.
If you don't compete but care about speed and faster climb and fast flat-lines = 29" if you are taller than 6.1".
I am 6.1" but I love agility and a 27.5 with a large or medium frame does my day with a huge smile...
Canyon Dominator or Track Slayer is a term that some buddies of mine use to describe what kind of use your car is built for, I guess it depends on your area. We have alot of canyons around here and almost zero tracks, some people build their car to perform really well in the canyons (uphill/ downhill) while others build them for track use specifically.
lightweight... I do greatly enjoy power don't get me wrong but I have learned while building my S13 that lightweight and low HP can still be just as fast as some high HP vehicles. Of course there are many things to consider with this logic.