Yeah, you're right. As Charlie might say: winning.
+1 a year is somewhat effective. Maybe it needs to be balanced upwards a bit? I'll have to see how everything plays out, but +1 a year is in a reasonable place.
EDIT: Ah, 0.1 a month is the
lowest effect any building will have. The highest is 0.3, and you can stack buildings. Yeah, I'd say these guys are worthwhile. It's gonna drive the optimizer in me
crazy trying to work out the best configurations though, since they tend to hurt relations with some races as much as they help with others.