Wow, this "littled sideproject" is really picking up steam
Some minor questions/requests/remarks:
Didn't you mention to plan to integrate the ForestGrowth mod? It isn't working anymore with v2
Dale's Hardwood mod would also fit right in.
The new buildings are fun to play with, but they might need a bit of balancing. We get pretty much duplicates of one half of some Civ's uniqueness (Iroquois, Aztec), very cheap and very early. And the synergies are just brutal (1F/3H/2G would have been a pretty good yield in Civ4 for a non-resource tile, in Civ5 it's just
, and +35% to base food production is not bad, either)
The bakery is also very strong compared to granary and waterwheel.
Flavouwise it would make sense to require the bonus resources to be in the workable radius of the city where you want to have the corresponding building, it's all bulky/heavy/perishable stuff after all. This will also make pooling of all those nice boni into a few super-cities much more difficult.
I also get only one bonus resource per worked tile, even on a terra map.
On the positive side, no UI issues for me despite running at 1920x1200.
Oh, and one really small but extremely annoying thing: When opening an empty build queue, shift-click will close it immediately, so you need to open it again for actually queing multiple items.