Heavensward question about weapons

[Vistari]

The Zeta will be decent gear until you're somewhere into the mid-50s and it will give you some kind of benefit in heavensward. No one really knows what that'll be.

The heavensward relics will start up in 3.1. You won't need a Zeta finished in order to begin it.

Has SE confirmed you don't need full zeta?

Has it been confirmed how far you need to have progressed?