I don't mind one bit, on the condition that over time they mine the rest of the series for similar events. I could totally imagine running into Edgar in the brothel in Ul'dah.

There's two reasons for this. The lesser reason is that, if you do want to be a stickler for 'game lore', it's been quite a while since they've come out saying that all the FF worlds are connected via the Void from FF5. That's the reason Gilgamesh shows up everywhere (and I'm thrilled that they're planning a series of quests around him in ARR).

The bigger reason I don't mind is because after all the complaints about FF13, and the complete initial failure of FF14, I strongly doubted that Square would ever announce a FF15 (and I'm still not really wrong about that, since all they did was rename a game they had already been working on, which a lot of people were starting to assume would end up as vaporware). So if they want to turn ARR into a fanservicey celebration of the series that came before it, then please, by all means. Because at this point it's going to be a very long time, if ever, before we see anything from Square that isn't a social game, besides what was already in development when Yoichi Wada got sacked as CEO in March.