I took a quick look at this. Like /u/sixoo bellow, I didn't get the same "black wall" you show in the video. The hard part about this is that everything you are showing here in this clip are the exact same particles but in different settings. All I have control over is what is actually drawn in the settings (eg. add this particle if settings are high or better, don't have this particle if settings are low, etc). The discrepancies here are all code side issues. I can see about getting a shelved alternate version of smoke (for grenades) in the game (as I would like to get it in anyway) and that might solve the "black wall" issue. The tracer not aligning on high and lower settings though, as far as I know, is entirely code.
Edit: Sixoo rocks for figuring out this is a Graphics Quality setting issue. I can see if there is something I can tweak to adjust for that, but chances are not so much. I will also test and see if the alternate version of smoke I would like to get on live has this issue.