I've played Tactics only this year and was surprised how much XII resembles it in mechanics despite these games belonging to different RPG subgenres. It lead me to think that XII only happened because there was this proper foundation of Tactics, so I doubt there'd ever be another mainline game in Ivalice, but more Tactics games are possible, I think.
I wish I'll have enough time at some point to get to the Ivalice storyline in XIV.
"Shit, forgot to buy thermal paste"