I've always wanted to be able to invest in roads or something.
Same here! But until now repairs went through civil work, mostly, because that increases your production. Consecutive investments can help too, if you're really into repairing roads... so somehow, it is already possible to "invest in roads" (and get other benefits too!). So I'm not sure if I want a separate "invest in roads" option, or if I think people should just simply invest more in their regions... Next to that I think that opening up the idea to invest in roads specifically, also require the ability to repair recruitment centres or other infrastructure.
I wouldn't mind a more in-depth economical aspect of the game, though.
