Wow, that's hard to say. The Samurai is a fast foot unit that attacks like mad. Each has its strength and weakness though. We deliberately design so there is no best unit. All have strengths and weaknesses.
Rocks breaks scissors, cuts paper.
Roads can be created in the scenario editor to dress up your maps, but they are not automatically created in Age2. Actually I don't know what to ask, I never really look at games until they are released. We eat a lot of pizza, barbecue, and Tex-Mex. And real quick, about the buildings you can only see in the scenarios, I think I saw these in a pic, there were white tents on the battlefield. I thought they were kinda new.