Currently, it is a known limitation that AEM SPA Editor does not have the ability to perform URL shortening -- refer to [1]. I did not find a timeline/roadmap for the implementation of this feature, however, if it is released, the SPA documentation will be updated accordingly.
When you own the model classes, you can implement logic to rewrite the repository paths accordingly. Should not be a big problem, and much safer than a heuristic provided by AEM itself (like the link rewriter).
