One thing that's kept me off is the readability of nameplates and differentiation between Friend and Foe. To fix this, I'd suggest adding the ability to relocate how it shows someone is a friend. Potentially to a yellow border around the nameplate, which solves a colour/sight issue and makes them moderately more visible/standout.
Also, I think that having a border in general will help in cases where many nameplates can overlap, allowing you to see if there's a friend in a cluster of people.
These should be considered as viable additions to the nameplate system and would improve usability in some use-cases.