This games SP and co-op campaign might be a shoe in for GOTY but I am only here for GM mode...
As the above post says, I have a feeling the "official" changes will be few and far between but i also feel like the steam workshop is going to be overflowing with GM mode add-ons and extras in no time.
I'm certainly hoping on it at least. As it is right now, i can do some real nice things but the perfect GM mode campaign cant quite happen yet until a few options i'm missing are added into the mode.