In the Streamlining part:
Forbid automated workers to build Forts!!!
I grow tired of FFH simply because of the extra management of always having to control individually each worker as they waste their time in making forts rather than production improvements....
Making all this manually is incredibly time consuming (especially as I like playing on huge maps...). And when the background changes (ex.: hyborem's landscape), it is visually very difficult to see what is the current improvement (I need to place the prompt on a grid, and read what it says... road, mine,...).
If I set them up in full auto mode for concentrating more on other aspects of the game, they start building pointless forts where a cottage (or anything else) would be just better on a medium/long term basis, and I end up taking back the control of a few workers for undoing what they did before, just for discovering a few rounds later that another worker came behind me and rebuilt a pointless fort!
In my games, I have the feeling to be in Albania!!! (there were about 700.000 blockhaus in this country...)
You can restrict on old/new improvements, removing forests, but can not have the workers restricted to real production improvements (mine, lumber/water/wind mill, farm, cottage). Building forts should be always excluded from automated tasks.