I build a ton of buildings, imo they matter in the beginning cause they do make a difference when you are a smaller nation. To blob-style players perhaps it doesn't matter but I do notice the significant difference in income by constructing buildings all over the place, manufactories included. The cost in MP is just okay, after all it is a choice you have to make to invest or not.
It's funny how 2 people can play a completely different game
If the game wasn't only about expanding, they would be fine. As it is, they are borderline useless in most cases.
It's funny how 2 people can play a completely different game