TL;DR
Allow showing the (production) statistics per surface.Not sure if the data is already in the game or if there's just the global data. If it already exists, this is only a UI feature.
What ?
Take the following window: It would be nice to filter those statistics (mainly production, maybe fluids and others) per surface.This would only show the production/consumption on this surface.
Why ?
There is a popular mod called Space Exploration which adds planets and inter planetary logistics. Those are implemented as surfaces.It would be useful to see what a certain planet produces/consumes to further optimize the factory. Just global statistics don't show the full picture here.