First of all, excellent game. I’ve put hundreds of hours into it and love it.
Here are a couple of things I thought might be cool to add in the future.
Tier 3 roads - brick roads : made from bricks or some more expensive two tier resource. Dramatically increase speed and maybe a little desirability. Would also match a lot of the second tier decorations.
Tier 4 roads - paved roads - should be ridiculously expensive, stone + clay + sand, three tier production.
modest increase of speed from tier 3, but dramatic increase in desirability. Could even have plants on its sides. Really ‘show off my town’ level of road.
Moats - I know this has been mentioned before, but I think its worth a mention again.
What I would suggest would be; shallow moats, or a thick bramble row (thick thorned rose bushes) that could damage and act like a moat in slowing attackers.
Slowing down raiders, creating damaging points would add more creativity to building defenses.
That’s a few of my own ideas. Love what you guys are doing. keep up the great work!