I see we can by upgrades for the colony in the campaign. What for? And are there any more details on the campaign changes?

UPDATE:

Watched Zultar's preview video. I think that answered it. Upgrading the colony is a way to raise your stock price and demand for certain things from the colony. Zultar wasn't clear yet on the victory condition, whether it be stock price or colony upgrades. He also mentioned that the campaign is now a limited number of days per round, instead of the previous buyout victory condition.