EPS export using Cairo, but import needs third party tool

First of all, I do not know the internals of Cairo library and the GhostScript.

Inkscape can export EPS using Cairo, but the import needs third party tool GhostScript.

I request to have EPS import too by Inkscape and not GhostScript.

The import is not the same as the exported SVG.

For example, draw a rectangle with a gradient without transparencies. Inkscape will create an EPS which is clearly vector.
However, at import by GhostScript, into Inkscape, the gradient rectangle becomes a raster. The same result is achieved at EPS import in Illustrator.

I have used Inkscape 0.91 release version, not beta.