Hey, so character creator for your game is fine. That's exactly the purpose of CC2D (well, the Unity version, that is).
As for the tool, I'd say that counts as reselling/redistributing the asset. If you use the asset only for promotion or example in video, then that's fine. Seeing as what you are selling is your system, not the asset, then I don't see why you need to include the asset from CC2D in it. Are you planning to include assets from Spine too?
In general, if you are creating a tool/asset, you'd want to avoid including other tool/asset in your package. Usually, if a tool requires another tool to function, then you'd direct the user to the original tool/asset, not package the asset inside your owns. I hope this makes sense.
As for upcoming features, we usually don't reveal much until it was near to completion, or for sure it's gonna happen. You know, to avoid over promising and such. Because we like to experiment, and sometimes things turn out won't be possible.