The design of turrets, flamethrower (and kits in general) definitly seems more like a industrial XX century weapon stuff than science-fiction XXII century stuff. So, yeah, engineer is designed beside charr technology. The problem i have with asura commander in general is the fact that, beside asura being a weak but higly intelectual specie, as the commander you are considered like a brute for everyone and it doesn't fit with the asura culture as a whole. In your personnal story you gain the snaff savant title at level 10 but taimi still talk to your asura commander like if you was a child or a norn and nothing in what you say seems to make you more intelligent than a charr,human,sylvari or norn commander. So, asura commander is not really an asura but is a simple brute like any other race. It's a big downside to me i never felt to be an asura in the actual story and with what the commander say and do. That's why, for me, Asura still to be a second rank race. I mean sure they have a HUGE cultural impact (portals, golems, weapons etc...) but they can't really be good soldiers (look at zojia who is a savant and use a golem and taimi who still in the dragon lab all long) and don't fit in a brave and martially unmatched commander place. But, if i must chose a class that will fit the asuran culture it would be elementalist first. Coz asura are magic inventors and a big number of asura are elementalists (including zojia or kudu) but i presume engineer would fit in theme (but the design and weapons used by the profession are definitly charr and so, retro, comparing to asura technology which make a quite odd situation: an asura inventor who use old technology) or even thief (it seems to be a high number of asura scouts or thieves in the order of whispers).