Hi Sam. 
We’re very fortunate (and grateful) to be featured as the default. However, would be even cooler to be selected by the powers that be for their own Meta board. Much respect though, I do favor Twemoji over our 1st gen graphics.
The new release will be all emoji up to unicode 9.0 (all to date) plus skin tones. We’ll also have skin tones available for smileys as well, which would be a first from what I know.
Thanks for the feedback!