This is more of a discussion rather than an engine issue.
I was thinking a few days ago, would it be possible to add rocket/missile launcher backblast as a feature in game?
Maybe adding a couple more points in memory LOD with an additional reverted muzzle pos/dir at the rear of the launcher, then in the config add a few config entries like backblast arc, range, and effect (like backblasteffect = "bb_small", medium, large, etc), like what is done for particle effects/spent casings of vehicle guns.
Then as backblast use something like a shotgun shell with bullets that have short "timetolive" and very high deflecting angles so in case you are inside a house and use a big launcher the backblast would injure or kill you.
Before you say it, i know i'm oversimplifying this sort of changes, i just wanted to write this down.