I was thinking a bit more about the "Celestial Lancer".
At first glance it sounds like one of the most random Titan-themed ideas there, with no real lore behind it... but we actually might have seen stuff like that in WoW before. If you look past how the vague description can resemble FF's Dragoon and Dragon's Dogma's Mystic Spearhand, it's also a pretty good match for the Val'kyr spearmaidens like
Hyrja. A winged Valkyrie hero infused with storm magic (they often have Light too but they'd have to differentiate that from Paladin) would actually be a great fit for a Titan expansion- maybe created by Eyir turning against the Pantheon?
And if Class Halls return, given how many Warriors seemed to think the Halls of Valor was a terrible fit for them, maybe this could get the Valarjar theme and Warriors could get something else?
I'd still prefer Artificer, Bard, or Tinker from the survey, but if this is what "Celestial Lancer" meant, it could be pretty good too.