I really appreciate the insight and thought process behind the changes. I think that goes a long way to helping the players understand what the goal is for what we see as a pretty massive change to a system many thought worked fine as is.
As someone who really likes that idea of being able to customize and specialize planets as mentioned, the only thing I still really do not understand is the Building change. I mean I get wanting to differentiate Districts, Buildings and Zones, but if "buildings modify jobs" is their main goal how is this any different than just having passive Tech that does this? Sure there's a small build and upkeep cost to Buildings, but unless 4.0 is also coming with a considerable increase in the number of Building types for the Zones, most Zones don't have enough Buildings to make any of it a meaningful choice. Most of the game it will be a "Build it or you just have an empty slot" until you've unlocked most tech for Buildings, and even then the choice will likely be to choose 3 of 4 Buildings which will be a simple "choice" for most players since most players will choose Output over Upkeep Reduction every single time unless they're in a Consumer Goods crisis.
This is also why I find the 9 slot speciality planet worrying as it nixes what in my mind is one of the big selling points of the urban zone system.Some points I'd like to make concerning an often brought up issue, which is building diversity.
A)The goal is roughly to have at least 6 possible buildings for the 3 slots for every district, that is the minimum.
B) The buildings you saw in the mockups, especially the robot factory, are placeholders. And to be super specific about the robot factory, outside of the government zone, the robot factory will not effect pop growth but instead handle automation.
C) The final goal for planet diversity is that the bonuses the buildings can give you should be roughly equal in their resource-impact. Production/Upkeep/Workforce/NewResource/PlanetModifiers/Automation are some of the categories we are considering for this.