Yes this would be one way. But maybe a suite of plungins that allows other renerers to consume .rel files might make for a better ecosystem.

To explain the use case: One advantage would be: maintain model (and views) in C4, provide layout on top.

We recently generated a big C4 model of the whole company. Good and informative since you can click through it! But it doesn't look nice and doesn't tell a coherent picture visually.