Now there is consensus that some players have trouble keeping track of metal/retroactive extractors on the larger maps. 

Simple UI fix. Just have a simple graphic in the metal/radioactive tab in game that is to the extent of "extractors built(and queued)/resource plots owned"

For example, i have a few nodes that total 10 metal, and i only have 7 currently built and one queued. It would just display 8/10.

Now the crucial part would be a simple button directly next to the "extractors built(and queued)/resource plots owned" UI spot that would take the player to any vacant resource plots. 

I believe this would be the least invasive UI wise and would get across all the information people are currently requesting. 

~football13tb