Still a contentious issue, even with modern diesels...so..
1) Why can't there be a light on the dash that tells you when a regen is happening? I know the signs in my car because it idles at 1000 revs instead of 850, but a lot of people don't seem to be able to tell.
2) Why can't there be a button to press to start a regen when it's convenient to the driver? I can drive mine to Liverpool and back on the motorway and the fickin thing decides to do a regen on the way to Asda the next day. If I had some means of telling it when to do it, i.e. on the motorway, then even if it wasn't full, it would purge what was in there.
Surely this is not beyond the bounds of modern technology?