So I almost didn't bother posting this because I come close to giving up on gm mode every day built the modders and idea of what it could be keep me hanging on.
Sorry to hear, you didn't like Game Master mode! Thanks for reporting and sharing your ideas with us though!
These could even be community made adventures and maps where its packaged into a nice little $5 or $10 bundle where Larian and modders both get a share.
There are Steam Workshop/Nexus allowing anyone to share and download mods and GM campaigns for free.