So personally like ive stated before i hated eureka but grew to like some elements of it.The relic weapon progression is deffintly still a lot easier than ARR's.
gave the ARR relic quest a go again.Spent 2 hours grinding fates non stop for it(Seem familiar?Its one of the main things people are crying about Eureka) to only drop 1 atma crystal out of the 9 i need before i even get to endure the book phase.

I think that the best course of action in future with relic weapon is one of 2 options.
Have your non dungeon Eureka relic and your Eureka relic.This means you dont need to do Eureka to get a relic but at the same time provides a reason to do both relic weapons.

The other way is to have 2 paths to progressing the relic weapon.One being through Eureka grinding and the other through non Eureka grinding.
There is no point in arguing to devs about not making the relic weapon a grind as its the only way for them to keep the weapons hard to obtain without putting a difficulty curve on it that will lock out your casual player base.