Hypothetically speaking, let's say during the patch that released the Zodiac weapon, there was an option to waive half of the required dungeons if the player instead had an Animus book or hunting log like "Kill Rafflesia, Melusine, the Avatar, and Nael deus Darnus." ?

What % of relic weapon users have defeated T5? T9?

What % would there be instead?

I'd say much higher.

(I know Coil and relic are intentionally separated, and relic is mostly to get people back in old easy content for new players)