While I do like the glow, and being able to modify its intensity it does not always do its job in differentiating enemies from teammates in my experience. I notice that when an enemy on the Red Team has blue armor I get confused on occasion thinking they are on my team (especially in heated moments when we are up close).
It would be very easy to implement a setting to choose enemy and teammate armor color. It would be very similar to the current feature to modify the outline colors. And, since it would be opt in, then people who want to see custom armor colors still can.
I would at least like to see this option available in ranked playlists. I could care less when stakes are lower.