[chinarut]

I just got this clarification from support:

the main difference between parallel and sequential projects or action groups is that in a sequential project, any action besides the "next action" are rendered unavailable (in grey text), while parallel actions are officially available (in black text)


so it works as advertised (ie. through coloring) but I have to agree with kasi, my workaround is to use folders to group mini-projects. action groups aren't very useful for me at the moment and I'm okay with this for now.