Give the possible Eureka 5.X its own weapon, and separate Relic from it

[Vahlnir]

To reiterate:
Have one series of relic weapons for 5.X
Give us multiple ways of working towards that weapon including 5.X Eureka/Diadem so people can do whatever they enjoy most

Why is there so much opposition to this solution? It's not like anyone loses out on anything, except maybe a sense of exclusivity.

Because it'd be a change. People hate change because reasons.