I never much liked the old tank leader rule, that is why I created the limited intrinsic leader rule for tanks, and other "self motivated" units. The 4th Ed recon activation is rather like it. I also recognized that my rule allowed for too much maneuverability.
When it comes to the attrition rate, here is how the cumulative probability breaks down:
Code:
Die
1 16.67% 16.67%
2 30.56% 44.44%
3 42.13% 72.22%
4 51.77% 90.74%
5 59.81% 98.46%
6 66.51% 100%
The percentage is the chance that a tank leader will be lost by that particular roll. I stopped at 6 because with my mod, a tank leader would always be lost by the 6th die roll. One option would be to say a 1 always kills, and a 6 always saves. Then you could add a training/cohesion modifier.
To your point, the mechanized corps, which were part of the reorganization just before the German invasion, were quite well trained.
Overall I am also thinking how all this would be applied to desert battles AoD, AK, DR, as well as the different periods & forces on the Eastern Front.