Using behaviors within Create

I have an app with most of my behavior scripts stored in script-only stacks which are attached as sub-stacks to the main stack. So two questions please:

  1. Are sub-stacks supported (or going to be supported) using Create?

  2. If not, am I right in thinking that all of my behaviors will now need to be stored as button scripts, and if so will this work using the widget button within the Create framework?

  3. Are there any other aspects of Create that will affect how behaviors work?

Thanks.