Come on... :D Do you really think it should be taking them more than 6 months to test the upgrade for an existing tool for their own upgraded version of the engine? How long did it take for modders to release FO4Edit, which is based on TES5Edit? 1 month, while playing the game and not getting paid... The creators of that tool even mentioned that the new engine is not much different from Skyrim's. But it not even fully coded, didn't not changed at all and you can't do much in it. The GECK is said to be changed drastically, so maybe that has something to do with it, or the delay, or balancing it out with dlc dates. Or heck, all of that. If they really wanted to prove that they promoted modding, more than any other company, they would have developed it before launch and released it with the game. You know, like XCOM, that came out 2 weeks ago. But they know that if they released it before their DLC the purchases of the season pass would plummet. They didn't have this problem with their previous games...