Seems like a lot of unnecessary work for a time walking event. It still doesn’t change the fact that players have improved or got worse since Legion. The point is that you can’t have it the same exact difficulty as it was before.
It either has to be easier or harder.
Once again, this doesn’t address the fact that people have either imrpoved or got worse since Legion. It is not likely the skill levels have stayed the same. So even with the same exact kill times, the challenges are going to be easier, because we’ve seen much more difficult mechanics since then, or they’re going to be harder, because some people have aged or gotten worse.
This doesn’t even address the popularity of WAs and addons right now.
Your argument is indefensible. If you don’t see that still, not much else we can really discuss. This has all already been proven with classic WoW.