We are in contact with the developer of ep128emu, he communicate us often. This emulator seems the most complete and up to date. As far as we know, there is no EP emulator developed more actively.
In the last times, IstvanV (developer of ep128emu) enhanced the Spectrum and CPC parts of the ep128emu. ep128emu is a multimachine emulator now. There are areas where the enterprise part could enhance, too, but the programmers (mostly IstvanV) resources never enough.
So it is all what we have, but it is near perfect in functionality. Of course, many things could be better and greater, but those things are not crucial.