One of the great things about Dune II, TA, or SC1 are the wide variety of unit locomotions, each with their own strengths and weaknesses. For example, wheeled/tracked units tend to be tougher, but are limited in the terrain they can traverse, while walking units are a bit weaker, but can get up slopes and stuff. It makes for more strategic options.
I know Brad mentioned they were going with all hover units, that this simplifies pathfinding. But it also simplifies strategic depth. I'm wondering if there are any plans to include wheeled, tracked, and walking units in the mix.