at least i think its simple. i find it can get a little difficult at times to locate the structure i'm looking for in the planet surface screen and colony management subscreens. later in a game when there can be many structures available it can get hard to find to find the simple ones. it'd be nice if they were organized based on more than alphabetical name (since the names of the common structures can change completely from level to level). if all the common structures came first and kept the same order based on type, such as:
starport
fleet manager
industry
farming
(etc)
then follow that initial list with available super projects, trade goods, and galactic wonders. i think it could smooth out organizing the structures of a newly, ahem, aquired colony.