They're a whole heckuva lot lighter than the x-15. I've had my hands on them a couple of times now, and they're a pretty elegant second tool, or even as a primary. I'm not sure if field serviceable picks are an issue with a pick that's not going to see much vertical ice/rock. If used as a workhorse tool, they'll just last that much longer if you can swap the pick out for a new one without worrying about replacing the shaft.
Also, even the standard Air Techs are soon going to have curved shafts.
My 2 cents at least.