I would be all for ADAPTING Jenova into FFXIV as the antagonist of a raid series or something.

But, not the FF VII Jenova. I don't want the same entity. I much prefer it when FFXIV adapts things from other FF games, and less so the first nine Omega bosses that just slapped in bosses from other games without needing to re contextualize them within FFXIV's setting at all.

I liked having Omega and Shinryu. Having Omega and Shinryu ripped from FF V, I would not have been a fan of. I would be fine with Jenova in FFXIV, as long as it's not literally the FFVII being.