Indeed your DSL is very nice! Even without knowing the syntax yet, it's pretty much readable.
Personnally, I would be ok with writing scripts if I have a text editor with at least some basic static analysis and autocompletion to avoid to struggle with stupid misspellings. With such features, it would be just as good as graphical editor, or at least a good backup method (for example while doing dev work on Android).
Thank you again for all your advises.