So it’s going to be time consuming to build a mod kit yourselves but you expect Epic to deliver that to you, Your deal with epic is simple, You don’t like what they give you contact them but don’t be heart broken when they decline doing your biding. Obviously making a side app for UE4 so that it supports modding will take time.
I can make a guess here alright and don’t hate for this post, I am guessing that the same thing like in CryEngine will happen where Licensed studios started sharing technologies to each other without Crytek in the middle which was an awesome thing. So it’s all about making it.
You got the source code worst case get a load of coders that are interested to help and make that mod editor yourselves is my suggestion, Again don’t hate the post it’s just my 2cents here.
So good luck with that petition of yours.