Inna is fun during 5 days max. After, Inna is utterly boring.
Etherals convey less gameplay / builds possibility than a 4th slot.
Etherals are just transmogs (some models already exist in-game).
If would reconsider if they allowed to equip 2 Etherals, or better, created an Etheral Set.
That would bring new builds, thus new gameplay.
But I won’t play a new season with zero new gameplay.
(Sounds logical, right ?)