I think they basically decided the D:OS1 modding scene wasn't worth cultivating at this point, and they're going to put their efforts into D:OS2 for modding. GM mode is pretty ambitious, after all.
And sorry, but voice overs, flashy graphics, and console ports probably do sell more copies than good modding support for 99% of games, as much as I love modding. Only Skyrim, NWN, and the fallouts have probably really seen a great number of sales because of a huge mod community. D:OS's editor was too complicated to join that camp, and the EE wasn't going to rectify that (though I admit, a delayed release really hasn't helped), but based on their kickstarter stretch goals, I think they will make a much stronger effort for D:OS 2.
