Yes, I'd been mulling over the possibility of banning Setsuki and/or unbanning DeGrey. Ultimately, I decided that I would defer that discussion until at least after this iteration of the event, for two reasons. One, I had already announced the event under the current ban-list, and it didn't feel appropriate to change the list after what amounted to a delay. Two, I didn't feel like the feedback was so convincing that it would be foolish to stick with the status quo for at least one more event.
These two changes to the ban list are still being considered for the next event. If Setsuki continues to see dominant popularity and win rates, and it doesn't seem like it's a matter of there being undiscovered tech from a less popular character, then I might consider it. After this event, I might open a discussion about the pros and cons of unbanning DeGrey, just because I personally think he's overrated on tier lists.
For now, the ban list remains as stated. I want to give this meta at least one more event to mature.
Edit: The only true constants of the 19XX ban list are Troq and Zane.