I though i was pretty decent by my second map, but whatever....
I guess you are right, it is more difficult than editing the XML, but i think it is harder than modeling. Besides, to really do anything interesting with XML you also need to be able to model, skin, and rig... and it can take some time to figure out what each tag does. All ive figured out how to do is change the speed and i messed with the T4B special abilities. My frigate pack mod got killed because i couldnt figure out the whole hardpoint thing...
But i suppose its a matter of opinion....