Thanks for the follow-up.
I would love to see the emoji size applied at the System Console level instead of the Account Settings level. With System Console, it's more of a cookie cutter for new users and they don't have to think about setting it, it just would "work." Maybe longer term, that's complemented with an Account Settings override, if users want control over the System setting, they could see all their emojis at n x n size. But - that could be overkill.
I didn't realize the "##" was an alternative. That's actually a great workaround. Awesome!