I've actually been wondering if part of the problem with the VH level is the reported +7 attack and its effect on kill rates and by extension: short fights with rapid routing. It would make a lot more sense to increase defensive skill a notch or two, and reduce attack skill. This would take some of the afterburner out of the AI charge effects, and at the same time make the AI less vulnerable to cavalry charges.

If memory serves, in MTW on expert units got a boost of +2 attack and +2 defense or something like that.