Your point about programmers having favourite editors (which I consider valid) contradicts the point you made about an important part of your audience being middle/high schoolers, which I don't think have such strong preferences towards one editor or another. It seems to me that you are making compromises to cater to the needs of an audience which is much broader than that you have identified for the language.

It would be a shame to compromise the design of an interesting language just because the target audience is not clearly defined.