You really should've worked for SEGA, Lol.
Without credentials or actual game making skills, they would of just tell me to get out and vent it over deviantART or YouTube like everyone else who "should of worked for Sega". While sometimes Sonic collaborations feel a bit half-arsed (Like, the 30th Anniversary collabs were great but were only so much here and there) I understand the degree of effort it would take to make such things for PSO2. And I think PSO2 would rather concentrate on getting the momentum of New Genesis on the way so I doubt we'll see Xia anytime soon along with PSO2-original events being more of a courtesy.
PSO2 New Genesis Global - (Wed) AC Scratch Ticket “Silhouette of Darkness” Preview Video
https://www.youtube.com/watch?v=V6NSqH32kKY
I'm reminded of the Phantom class, or the ninja look would suit the Phantom class well. Certainly would be better than the edgy look.
Phantasy Star Online's Forgotten Card Battle Sequel Deserves More Attention
Article : https://www.cbr.com/phantasy-star-online-iii-card-battle/
I never played episode III so I wouldn't know, but from how it's described I think it would of been better off as a side game. Like how Triple Triad was in Final Fantasy VIII. If Card Battle was introduced in PSO2, it should probably be special missions along with duel mode for two players. Or a side-story episode that can only be accessed in the Casino area. Like maybe the Casino. Like maybe the Casino is hosting a card dueling tournament and throughout the story you duel with familiar NPCs from the main story mode, maybe some sort of crisis or mystery happens during the tournament that the story wants you to solve, all the while not impeding with whatever episode you're currently on (Though perhaps progress in the main story maybe required to prevent spoilers, unless the game is exclusive to Council of Six and ARKS organization.