I don't play this very often, but when I do one of the things I enjoy most is building maze like bases to confuse marines and installing nest rooms outside the primary base. A big problem with this however is that it's really hard for other aliens to find their way around any labyrinths you build because their line of sight is broken, they may never know you put a nest room somewhere because they only care about getting back to the primary nest and they're usually annoyed if they don't have an easy path.
Therefore I suggest that aliens are able to see resin structures and weeds at all times, even outside their line of sight. This way navigating complex hives is a breeze because they always know the outline of every room and what is inside of it, even if they can't see if there's any creatures inside of it.