Courtesy of google translate: "We wanted to implement the lamp [ramp I think] in 12 different angles. There are a lot of map editors and exchanges, but I am worried about lamps [ramps] and implementing custom lamps [ramps]. We plan to localize it as a map editor. I am sharing various information with SCM Draft 2, and I am trying to expand this function. I think that there are lots of creativity in the case of custom maps. We will provide support for custom maps, but the map we have to give up in the remaster was EUD maps. I have an abuse case. I thought this would cause security problems for the player. I am still thinking about how to proceed with the support of community users and maps. I think EUD maps have a lot of problems right now. Usage maps will be compatible and implemented immediately after the remaster update."
Source: Q&A session from http://m.post.naver.com/viewer/postView.nhn?volumeNo=6935865&memberNo=22031991
So in summary...

• Map editor will incorporate/expand features of SCM Draft 2
  
• EUD maps wont be supported because of security issues
  
• Support for custom maps will be given after remaster
  

Nice to see you around a BW community, Sixen.

There is a low likelihood of blizz supporting modding at all, especially if they move to CASC (a likely possibility) and change the file structure of everything. This 'support' of mapping is probably the best we're going to get out of them, and if modding can exist at all post SC:R launch, it'll have to come via a CASC viewer/compiler/decompiler. Hopefully it doesn't come to that.