[Skywalker101]

Well I did say in my original post that they would take a constant fee as well by keeping 20% of the produced spice from a system. Ie if it produced 10, you would only receive 8. I also said that perhaps they could cap the autonamous terraforming up to T2. So basically the most spice you could potentiallly get from a system, which you only placed 1 colony pack in and then left it for a Governor to use, would be 8 units of spice.

If you wanted to get more than that, you would have to place a spice storage and then personally terraform to T3 and add another colony pack yourself. So in total this way you would produce a maximum of 24 units of spice autonamously, once you return control to a Governor.

Now you could increase this further if you:
a) decide to place a colony pack on multiple planets in a system. ( so maximums would be mutliples of 8, if you dont get involved after initial colony placements)
b) own a rival homeworld planet with a spice storage would be 72 or 80 units ([45 x 2] - 20% = 72)

Basically, the idea is that you do get spice automatically sent to one central location and so stops you messing about going from planet to planet picking up spice, but at a cost of an inital Governor and 20% of everything produced.

I think that is fairly well balanced as you still get a fair amout of spice out of it but not the most productive amount.