I am sure HTC is aware of how the tracers look and is working on improving them.
Just by observation, I will include what I have found with the current tracers.
Do this test --
1. In a Tiger, turn on tracers and use the Pintle MG. Use external view and then fire tracers in an arc going around the tank.
What you will see is that all of the tracer trails stay exactly the same appearance. Then rather than the ends spreading and disapating like smoke, the entire trail quickly fades then disapears all at once. <<-- that looks rather (for lack of a better word) stupid
I think to make the effect better, we need to see the ends of the trail spread out and then slowly disapate from the source to the impact point of the bullet.