though in that regard why not just have them use drones since they are robots (more or less) anyway.
do you mean use drones in the sense of the weapon Drones? or like unmanned drone craft?
either way, i dont think the Asurans would use simple machines (insofar as a semi-sentient craft) to do their bidding as they think of themselves as the 'children' of the ancients, and so they try to emulate their parents, even so far as to actually pilot a jumper etc manually, rather than 'interface' with it directly.
and why not use only jumpers? because in Sins you need to be able to distingush from fighters and bombers, so someone came up with a clever new ship...