Stencyl forces you to use ECS in a very nice way and I can safely say that making a game in Stencyl made me a better unity developer.
I feel the same. Though I can't make even a single simple game in Unity yet, I still feel like I understand things much better after months of experience in Stencyl.
I believe playmaker is really good enough like Stencyl's building blocks from what I read about it. Many totally non developer seem to be able to use Playmaker to code games. I am just yet to test them.