The analog stuff either works or is completely dead...at least that's been my experience w/ the 6AL boxes.
I've had high speed misfires w/ the older Digital 6 Plus boxes and the Digital Multi Retard boxes, but otherwise they ran fine.

At this point, I'm all about keeping it simple. If the 6530 comes back, I'll give it another shot. If it still has issues, it's coming out of the car for good and the analog stuff goes back in...for good.
I'm far from a "serious" racer. I mostly test and tune and run the occasional street car/KOS shootout.
I have zero desire to plot a timing curve. All I want to do is pull timing out when the nitrous is activated and have a couple of rev limiters. That's it. I have all the control that I want w/ the nitrous progressive.
I don't want an MSD Grid or anything resembling Holley EFI on this car. I'm not setting the world on fire here w/ my two ton sled.
If this thing would still do a burnout on 20° of timing, I'd just manually pull the timing out, lol.