The thing for me is, just because you CAN use them for fills doesn't mean that you HAVE to... it's simply another way of triggering another scene, arp, loop, whatever you want to call it. Just think DJ's cross cutting between tables. A way to go back and forth with two loops, and yet have them BOTH in sync with each other.
And, not JUST because it makes them good for fills... a loop that is programmed to go to another loop once it plays one time is a staple of DJ-ing. One-shots, aren't they?

You see, I think that those features that would help US would also help someone into electronica... All I'm looking for is a system that serves us BOTH. In sync arp switching and one shot loop destinations don't seem to be all THAT backwards looking... and would allow us all to straddle the line between arranger and Karma/arp/loop players wherever we felt like.