I'm hoping that the Hell's Lid storyline will involve Tansui in the same way that Skalla involved Arenvald and Alphinaud. The Ruby Sea is largely controlled by The Confederacy so it would make sense for them to show up if a threat is identified in the area. Catching up with memorable characters and going on an adventure with them is something I want to see more of moving forward. That I may have a crush on Tansui is completely unrelated. ¯\_(ツ)_/¯

I also want to see more of Magnai - and the Xaela in general - to see how they're faring. Extra points will be dished out if we see a few members of some of the tribes that did not get screen-time the first time around.

I'm cautiously optimistic about Yotsuyu's involvement in the story moving forward. I'd prefer her to be faking amnesia in a last ditch effort to try and get close to Hien. I'd prefer her to not succeed (admittedly since I'm rather biased and like Hien quite a bit) but I simply don't want her to become a shy, submissive 'waifu' for Gosetsu. There's history between them, since the implication in previous exchanges between them is that they both served Garlemald's interests in the past. Though I'll be rather annoyed if it turns out that both Fordola and Yotsuyu are getting a redemption storyline that also allows them to live afterwards when the likes of Gaius, the Warrior of Darkness and Regula did not. Especially in regards to Regula, I want to see Emperor Varis' reaction to his best friend's death.

Relevant Xenoblade Chronicles 2 Spoilers:

Some of the major antagonists in the game are shown to be fiercely protective of each other and show genuine concern when the protagonists threaten their companions. That is what I want to see more of within FF14. It's a lot more interesting than having the antagonists cackle and treat their underlings and comrades as pawns.