I'd say the fact that Wraithlords are reserved for GRORIOUS HEROES is about equal to Princeps having to be built up for the role.
Warrior-Aspect Warrior-Exarch-Phoenix Lord is literally power level for an Eldar (not getting into Autarch, Seers, Etc), more so than whatever the dude who wrote the Imperium one imagined the Imperial power levels to be.
I highly doubt the Avatar's Sword is the only Eldar weapon that is GRORIUS enough to cut through a tank. But that's not the primary point. The primary point is that the Eldar are a fallen race who refuse to even try to create new shit because they 100% that their ANCESTORS GRORIUS TECH WAS SO GOOD YOU CAN'T BEAT IT WE WILL ONLY USE IT.
I refuse to even go half way with you on this one as their are numerous references of the Eldar, at the very least, going to the Spirits within the IC for guidance.
I just sort of added the pride and honor so I take it back and apologize.
I'd say the fact that the Exarch moves are so SUPA SPECIALARU that they get represented via tabletop makes them pretty supa specialaru.
I don't even think the Eldar are the least bit weeaboo but this is what happens when you generalize.