Yay this thread...again.

If you gate atma/animus behind bosses - You just made another weathered weapon.

If you make it based of quests - You'd need about as many scenario quests as currently exist total to even create any type of time sink. It's really not reasonable to release that much content for 1 stage of an item.

RNG/Grind is a perfectly fine alternative to weathered weapons which require the skill and patience against other players going for weathered weapons.

It almost all plays parallel. Levi requires a mirror with an extremely low drop rate to achieve 100. Animus requires 12 rng atmas and 13,500 myths which require less skill and more time, and weathered requires more skill and less time to a degree (based on if you get the unidentified tomestone and are beating T7)

Reward - The grind sucks...the reward feel great once it's done.