Right now we only have a weather system which applies negative effects. To be honest we didn't think about "uphill" and "downhill" until the system was already almost done, so it was hard to justify re-balancing parts of the game to include a feature which we didn't think was going to be that fun in the end.
Our best idea was "If you start your Maneuver phase on an uphill section, subtract one success from your Maneuver phase roll"
And, "If you start your Speed phase on a downhill section, add one success to your Speed phase roll"
It's a little Power favored which makes sense honestly, but its effect is pretty insignificant overall.
Buuuut that's just our idea, you could always homebrew something that is better!
Anyway, thanks for the feedback!

