Will there be (functioning) roads?
Will they improve the speed of your people or just be cosmetic?
If so, will they emerge automatically by well-trodden paths, or do you need build them yourself?
And if there will be roads, will the roads be upgradeable or maybe even autoupgrade?
(One feature I really liked about Settlers 2 (which this game reminds me a lot of) was that roads that were used a lot would eventually upgrade to darker roads (and add pack animals), it was a very good way to visualise the most used paths in your economy.)