Since MWNL2 ended I have been noticing some pretty appalling texture bugs, the most common of which are purple Tanks/Base buildings and invisible buildings with only doors and floating windows. It gets worse with every match but seems to go away when I restart the game.
I alt-tab to desktop during matchmaking and that tends to cause some funny things but this is new and pretty bad to be honest.
This sounds like a Driver Issue. Did you try updating your drivers?
This means that they are working on it. Obviously, they can't announce fixing the Veterancy bug on the patch notes, yet, until they have implemented (and tested) a fix that works.
It's being worked on, but we're not going to say its fixed before its fixed. I hoping to get this into the Feb 25th patch