i just read this post now...
and i have to say, i'm a user of coreldraw since roundabout 25 years. they had the option of embedding fonts in their EPS-exportfilter since the beginning, and the import of EPS files with embedded fonts has been working from the start, too. there was always the choice of importing text as vectors or as text for editing it. in the most cases (99 %) everything's been fine, especially if the fonts were installed - in other cases there has been the choice of panose as you use it in the PDF importfilter.
so what's the problem with creating EPS import- and exportfilters with editable text?