Why should it be a 'declarative' language? There is no inherent benefit in that IMHO. I want the full set of capabilities that a general purpose language can offer, and still be scriptable. What is easier or more legible is very subjective. Your example does not seem easier to me.

Another thing is that I chose to use an existing language instead of creating a new one. I chose AngelScript because it was very easy to integrate with the implementation language (C++) and because it existed, was well documented and had all the features I wanted.

You could argue that one could choose another existing language (Python or whatever), and that is fair enough. The design is such that the language interpreter is entirely separate from the boolean engine (they are different executables), so all you have to do is implement the AngelCAD features in the scripting language you prefer and give it to the world. That is essentially what I did.