I'm not in the slack group. Hope you invite me to the group!
For the ArtCenter, I have participated in the Zoom chat today. Kevin has mentioned that the program doesn't fills up until the start of May. So we have some time, though better push the decision within 10days - 2weeks. ArtCenter as you have mentioned is more focused on critical and speculative design + have opportunities to participate in the research projects.
Hope we can talk more about each school's pros and cons in the Slack.