I have yet to reach that part. I have just played the campaign more or less since it's a bit more of a "go ho" and my unit creation seems bugged as I can't even build single units of explorers and settlers but always in groups of 4. I understand that this is a intended feature nowdays but only for combat units?
Anyway Ive heard stories about the terraforming magic to. Seems a bit to strong indeed. Maybe if it could be coded out of the game the game would be far moe balanced? Althought it is indeed very innovative! (Well not so much innovative as re-invented from games like Populos but most things are re-inventions and re-imaginations anyway).