Let me put this a different way: isn't it somewhat offensive to assume that minorities can't identify with characters that don't look like them? Shouldn't a character's personality, motivation, and life experiences (which representational characters have gotten a criminally small amount of) be much more important than physical appearance?
We print a merfolk. I get letters saying “A merfolk - yeah! Thank you.”
We print an ethnicity (or other attribute) we haven’t printed before. I get letters saying “Thank you so much. You have no idea what this means to me. I’ve played Magic for many years and finally seeing a character that looks like me gives me this sensation that’s hard to describe. It’s something I didn’t realize how much I needed untilI saw it. It makes me feel included and accepted. Thank you, thank you, thank you!”
I’m encouraged to make more of the first (and once again we will), but, wow, am I really encouraged to make more of the second.