There's a lot of hints in the old colony books about them training forces on the colonies that implies long term missions to train locals and give them Terra Novan tech... I think there's a neat segment in the Atlantis stuff where an Atlantis native (a water-world, of course, with deep cities thousands of feet underwater. Keep in mind Terra Nova is an arid world...) is looking at plans for an underwater-modified Gear and picking it apart because it's obviously not designed by a culture that takes living underwater seriously.
I know I suggested, a couple times, that
BTs should have some sort of wacky rule to make them the stereotypical cavalry where they come in on a random turn, but from a random board-edge, so you might get them behind your own force, might get them behind the enemy.

But there's probably reasons I don't write rules...