HotA - General Questions and Discussions

I had an idea to edit 2cm2c(2) so that secondary terrains like sand, swamp, and snow cannot be generated. I'm also considering adding a snow-themed Castle with a Fortress for guild outposts. What do you think? Or which type would be better to add (with a Fortress to protect the guild)? This is also important for Papich's template, as skirmish mode doesn't seem to have this issue.