Coincidentally that player always joined the blue team. And yes, I know, the lighting is bad in the screenshot.
But I think this is something easily addressed.
I mean, yeah I could activate those team markers, but that just means a bunch of moving icons which hover over the moshpit with no good way to tell who is who anyway.
TL;DR:
Strictly enforce teamcolor across the model.
Switch red teamcolor to something else (because of bloodsplatter). Or better: make both customizable.
Allow preview of loadouts in teamcolors.
Make it all optional clientside, no nobody can complain about changes.