- Allow terrain and sector type to matter more, to affect the amount of movement points used. It should be harder to move up or down a a mountain than to walk down a city street.
- This would allow for more skill specializations to reduce the movement cost, or gain other advantages. Ex: a merc specializing in urban combat, or a strider specializing in desert combat.
- Diving, Climbing, Crawling, Jumping, Swimming, Waterbreathing, Brachiation -- more movement types from room to room, requiring the needed skill. Falling damage? Drowning damage? Downside, would make building more complicated.