For info, after talking to Rugger two things. Because there are going to be potentially a lot more streaks the '1 less kill' part of hardline has been disabled. The initial request was to somehow make it harder to get the car but the kill requirements are hard coded. Reroll still works however.
The other is that the red triangles for air support are disabled. That is because the mod was never tested with more than 32 players and that was the recommended max. Partly due to freezetag limitations. There is a finite limit on the number of hud icons allowed at any one time and I could not guarantee the target markers wouldnt cause problems with 24 enemies instead of the usual 16 max.
In the future I will do more testing with 48 players, and more items like more care packages and mines (hacker 'skull' icons), and if need be rewrite things to force a hard limit of 16 on the markers. It would sort itself in real-time to choose the top 16 players on that team to represent the enemies with the greatest threat factors. Helicopters work on the same principle.
One thing I am interested in. Since the car has no need to defrost it will in-effect be the 'kill-only' car in 147. Gameplay will show how that works. If its currently too much of an automatic kill.