Bad Company 2 has been patched on consoles. I had a quick 10 minute game and shot down 2 Apache helicopters on Isla after placing a tracer on them and seriously damaged a Blackhawk.
Wow, this is game changing. The blackhawk pilot did have vehicle smoke (I know because he killed me as soon as I entered the game) but after I planted the tracer he didn’t try to remove it by firing the smoke.
The tracer isn’t quite fast enough that you can point at a moving vehicle and hit fire, you’ll have to lead it a bit but it’s much easier than before.
Edit – Mick has listed the changes by soldier class making it very easy to see what has changed in each.