Rockets currently have an unrealistically large fireball effect when impacting, same for tows/rpgs/s8/ and so on. If you were to take the effects from something like the apache 30mm, and upscale it like 300%, increase the smoke and you would have a much closer representation of what it looks like in real life. Little quick flash...lotta smoke, sometimes no flash. The current rocket effects would definitely be realistic as-is for a thermobaric warhead IMHO. I know this is probably much easier said then done to do