Smoke in A3 looks hundred times better than A2. It was significantly improved but still it can be improved in some areas.
On distance black smoke should became more grayish, graphite than black. Also smoke should disappear much higher. Should stay longer and be much greater.
One thing that infamous OFP:DR did pretty good was distant smoke.
On the orher side smoke of this size would need huge amount of particles - or maybe different way of rendering it at close - and at far.
At close shows up particles - at far shows up a texture?
This way if we are standing right to the burning vehicle at 15-20m what we see is particle and higher is just an texture. Not sure if this is possible - im not an expert.