I think progress since the mapmaker was publicly released has been huge. I'm hoping experienced mapmakers and high level players get a bit more involved with this project now that it's been brought back into the spotlight by the recent tournament. If I'm not mistaken, Sheikah had put out a call to mapmakers for help with the look and feel months ago, but I'm not sure how much attention it got.
I understand that inclusion in the ladder might pose some technical issues but I think they're worth investigating. Random maps are very noob friendly compared to regular maps: no meta, no specific builds - a level playing field. If the long-term goal is to encourage people to shift to ladder rather than custom games, ignoring the map generator's potential to help in this regard would be foolish; it's common knowledge already that many people stay away from ladder because they feel it's too tryhard.