Celestial opposition needs something more

[magnanimousCynic]

We still can't use that last constellation they went over in the plot anyway ;_;.

It's impossible to open the last gate and live.

Jannequinard's exact words about the final gate (Source: FFXIV: Atrologian Job Quests (part 6) by Ethys Asher)

"Lady Leveva tells me that you are nearly ready to open the sixth and final gate. Yes, I said final. We all know there are seven heavens, but opening the seventh is impossible...well except upon death, of course. An attempt to attune with the pole star would be sheer madness and most certainly spell your doom."

Honestly I'd prefer if we never open the seventh gate to keep its aura of unknown power. Besides, in 4.0 we could use other types of celestial bodies to power us up, like comets or quasars or nebulae.