Have you worked with Creator ? You sound like you did not...
Creator is a stand alone solution with its builded engine. If I change something inside it, the engine must be rebuilded and then I need to send Cocos Creator to everyone on the team.
The engine is not commit in our project.
Cocos Creator is exactly like Unity, you can't just change some part of it on the fly, no one will have them. And I don't have the time nor the desire to hunt down change in Spine and make sure they fit with the Creator Component.
If I was working directly with Cocos 2d engine yes, but this is not the case right now. So I will wait for the next release of Creator and use their version of the fix.