Not to start an argument here (as I don't care all that much if it's explosives or energy weapons), but the FT damage is not caused by a shockwave pressure or shrapnel, but instead it burns like laser and plasma.
True, but what about the other use of flamthrowers, to svck the air out of bunkers to suffocate the the inhabitants? If I remember that's similar to the pressure vacuum created by thermobaric weapons.
You make a good point that plasma and photonic weapons burn their targets, like a flamer.
I don't know, it just seems to me the energy weapons skill is about your proficiency with high technology energy weapons.
The flamer is a relatively low tech weapon in comparison to the plasma caster.
Such a thing seems like it would fit better in the aptitudinal domain of guns or explosives.
Same argument as to why the Gauss is an energy weapon, despite it firing 2mm solid slugs- because its important systems are more similar to energy weapons than convetional guns.