My guess is that with EECH2 around, getting hold of the rights to EECH was more problematic.
Good point. It would be interesting to know what kind of exclusive rights the EECH2 folks have.
I would hope if Razorworks worked with GoG on EEAH they might be willing to do so with EECH. I'm sure they would simply be releasing the original game patched up with the last official patches as they did with EEAH.
I am sure EECH2 would not like the competition with EECH+ if folks had more ready access to EECH but without knowing their agreement with Empire/Razorworks I don't know if they can do anything about it.