Firstly, I'd like to thank the official forums UI that will not let me correct the typo in this thread's title, even when it claims I have. Consider Ardbert the Friendly Ghostly now embraced as my headcanon, SE. You win.
Secondly, his promotional art is definitely still there. Second image in the "artwork" section.
https://na.finalfantasyxiv.com/shado...ers/patch_5_1/
Thirdly, I thought he was merged with us and therefore not interactable anymore, too. Again, if they go all Frey with him, I'll still be happy. Kinda makes the "walking to his friends" scene make less sense, I think. But I suppose its not like his soul could really move on anyway if it was merged with us??? Personally, I'd be fine with Ardbert providing running commentary in every other CS for the next three xpacs.
I hope the soul expert in next patch really has some lore bombs for us on how exactly souls work in this universe. The pixies, the fuath, the soul fragmentation, the scions... we need some confirmation on the rule set around souls and aether and how they are different, if they are. lol