For me, a big part of planet management is the state of the civilization has a whole.  That is, if my total credits are high enough, then I'm not as worried about a planet that is bleeding money.  Or, when sitting on the planet screen, thinking about whether to "buy" a improvement, I like to ponder how much of a dent it makes in my coffers.  Or, being able to quickly look at my civilization's income, growth, or what not... those have an impact on how I manage the planet.  

In my view, if it has a noticeable impact on a certain feature in the game (planet management), then it should be accessible from that feature's UI. In GC2, "global" values such as credits were provided at the top bottom of the screen - easy reference.  However, in the alpha, as well as in the pic from the founders vault, this is missing in GC3.  Instead, the player has to leave the planet management UI to check... and then head back in to make the decision.  But if you are like me and you take a moment to think, then you end up entering and leaving the planet UI a couple times to double check.  This seems unnecessary.

I suppose this is both a point of feedback as well as a question of why the design is as it is, (I'm open to being convinced that it is better this way). or, whether having global values absent from the planet screen is a temporary lacuna which will be filled in future builds.