Since the nerf they are pretty comparable to CoH flamers, the reason they dominate so hard is because Grens and Scripts can't kill them. Once (if) their rifles are buffed, it will be much better I think.
Yeah that may help deal with engi flamers but what about halftrack flames, a big reason they are so deadly at the moment is the damage on retreat plus the high movment speed of the vehicle making it often impossible to escape from if your caught out of position even if you retreat at full health. Damage on retreat should be cut down to around 20-30% for flames IMO