On the main system map, instead of abbreviations that show where shipyards, resupply, ect. that seem to get jumbled and hard to read with the more stuff a planet has, how about a ring system that stacks. Red ring for ship yards, Green for resupply, yellow for training facility and on an on. If there happens to be a main planet and several colonizable moons that all have ship yards, then four red rings to signify four ship yards. Optional of course for those that don't want the visual distraction to clutter the aesthetics.
As far as visual significance, I for one beleive that one would just be able to look at the system map to determine where all of your specific priority planets are. See and Immediatly know everything you need to know from a strategic standpoint about your planetary system. Instead of relying on memory, there is eye candy right in your face telling you what want to know without clicking on anything.
This could work with intelligence too, discover something about a specific enemy planet and wham, nice little ring and a potential target to help one plan for an invasion. With enough intelligence missions eventually one will have a nice set of enemy system maps with an assortment of visual rings to deteremine where to hit em where it counts. Nothing like a big fat and stacked juicy visual aid to guide a fleet by.
