Hector,
Very nice library. I use shoebox http://renderhjs.net/shoebox/ instead of TexturePacker, so i whipped up a little preference file that would make it work with SpriteHelper.
https://github.com/superqix/ShoeboxDefaultsforCorona
Also, if I could make a suggestion. I would add a finalize listener to the Spine displayGroup to listen for the object being deleted to remove the enterFrame that runs the update.
http://docs.coronalabs.com/api/event/finalize/index.html
This way, I can call a display.remove() on a group containing a spine animation and all the eventListeners will get removed at once. Does that make any sense? 
Anyway, nice job,