I'm following you out the door. Interesting to see these threads full of fan boys who are blaming Apple for "breaking" the code that worked in beta. Do they know for a fact that Line 6's code conformed to Apple's standards? And how do they explain that other vendors' drivers are working with the production release of El Capitan? No I think this is more a case of sloppy project management by Line 6, and limited resources directed toward producing other products. Sorry if I'm not a fan boy.
If I'm not mistaken this is the second time that Line 6 has been behind the ball when there has been an OS upgrade - or at least in my experience anyway. I'm seriously considering moving to another platform after this one. At the very least Line 6 should be posting updates as to their progress and an anticipated release date.