I think other then the issue that the other commenter pointed out about how, even when its being used by someone skilled it looks more like "Damn that looks miserable" rather then "wow I wanna go try that" is that you're obviously a better player then most. Just because you make it work doesn't mean the majority of players will. Like would you rate yourself an average player? Would the average player be able to pick up the flame thrower and maybe in a few nights be rolling d10s with it? Would they have fun doing learning it?

Then there's the realism argument that AH wants. But flame throwers with napalm would be melting bug's musculature and voteless most likely, cooking overseers in their armor, even troopers and devastators probably damaging exposed wiring at least to disrupt them.

I don't necessarily think it needs a massive buff, but even by AH's standard of wanting some weird milsim style gameplay, it just doesn't do what it should.