Many of those issues have been fixed either in TG 3 (as of 3.1 in particular). Population Lean To Normal helps, as Bobby pointed out, and there were specific terrain displacement improvements that help with terrain on the "other" side of the planet, away from the 0,0,0 coordinate origin. Navigation can still be a challenge, but with the ability to specify orbit point and adjust other aspects of the camera mode, it isn't too bad.
- Oshyan