Here's a mod I made for my own use but I thought I may as well share it with you guys.
I'm finding I'm using the NATO icons most of the time as they make the map that much clearer for me. I do find though, that the unit bases seem to take up too much room in the hex, so what I've done is get rid of them without losing the background colour if you're not using divisional colours. Here's a demo of a game with and without the bases:
The mod is JSGME ready, just unzip into your mods folder. If you don't use JSGME, unzip the file to your desktop, open the folder, select all the folders inside then copy and paste in the main PZB Normandy folder, allowing any overwrite requests. Make sure you back up first.
Invisible Bases.zip (Size: 145.75 KB / Downloads: 19)