Which is exactly why i am currently designing the X-Worlds Icons/Queries sets with that type of focusing symbols and coloring schemas.
Using Alpha-channel and a corner (on queries) i can even fit a terrain type circle-like cue indicating what is right
underneath the building on the surface. Another corner will also receive a sort-of-symbol for categories, again colored to ease the identification process. I might also insert a kinda
Stepping-Ball-Icon with fractions to indicate first through last for some types of buildings.
Mostly the names will also reflect these patterns since, for example, the Basic/Labs through Discovery/Sphere group should probably be described with simple stuff such as this; Laboratory-1 to Laboratory-5 (or -- abc_def, alpha_omega, etc)... while sticking to most of the true X-Com features & principles found in the bases layout. Radars, Access-Lift, Hyperwave Decoders, the list is extensive - adapting any to GC (similar but somehow, different both visually and descriptively) becomes a matter of choice and careful planning.
In the case of GC2 Defaults and their data/values there's always the possibility for anyone to step right into the xml file (PlanetsImprovements) and edit anything as required... but that involves thorough understanding of the data and its 'dependancies' and not to alter the wrong lines which would cause more damage to the code than help out.
But, that's modding at user level only. Having SD and its staff consider
another system for its own designs is a different issue altogether. Can't please everyone at once, that's for sure.

- Zyxpsilon.