Hmm, you seem to have missed that Crafty can do scaling/rotating/moving/fading animations through the "Tween" component. (I'm not actually sure what "Sequencing" is in that context.)
wow, I did miss that. So has many other people who have looked at it, including the original creator of Crafty :) Not sure how that happened, but thanks for the heads up.
http://craftyjs.com/api/Tween.html